diff --git a/Makefile b/Makefile
index 8f6cdc03..5d97416d 100644
--- a/Makefile
+++ b/Makefile
@@ -251,6 +251,7 @@ TESTS	= $(BIN)/test_smoke $(BIN)/test_lex $(BIN)/test_parse $(BIN)/test_check \
 	  $(BIN)/test_arr_zero_vs_infer \
 	  $(BIN)/test_def_str_index_reject \
 	  $(BIN)/test_struct_global_byval_arg \
+	  $(BIN)/test_inferred_global_let \
 	  $(BIN)/test_slice_str_global_zero \
 	  $(BIN)/test_slice_literal_global \
 	  $(BIN)/test_global_arr_elem_field \
@@ -665,6 +666,12 @@ $(BIN)/test_struct_global_byval_arg: test/wcc/822_struct_global_byval_arg.c $(BI
 		$(LIB)/libwwrt.a | $(BIN)
 	$(CC) $(CFLAGS) -o $@ $<
 
+$(BIN)/test_inferred_global_let: test/wcc/823_inferred_global_let.c $(BIN)/ww \
+		$(BIN)/w6c $(BIN)/w6a $(BIN)/w6l \
+		$(BIN)/ww_ww $(BIN)/w6c_ww $(BIN)/w6a_ww $(BIN)/w6l_ww \
+		$(LIB)/libwwrt.a | $(BIN)
+	$(CC) $(CFLAGS) -o $@ $<
+
 $(BIN)/test_def_arr_infer_len: test/wcc/814_def_arr_infer_len.c $(BIN)/ww \
 		$(BIN)/w6c $(BIN)/w6a $(BIN)/w6l \
 		$(BIN)/ww_ww $(BIN)/w6c_ww $(BIN)/w6a_ww $(BIN)/w6l_ww \
diff --git a/cmd/wcc/check.c b/cmd/wcc/check.c
index 081b55af..25324151 100644
--- a/cmd/wcc/check.c
+++ b/cmd/wcc/check.c
@@ -3015,7 +3015,19 @@ check_file(Checker *c, Node *file)
 						err(c, d->pos, "[_]T needs an "
 						    "array-literal initialiser");
 				}
-				if (d->type == NULL) d->type = type_default(rt);
+				if (d->type == NULL) {
+					d->type = type_default(rt);
+					/* #150 bug-1: pass-1 installed the Sym with
+					 * the annotation-less NULL type; without
+					 * repointing it, every downstream N_IDENT
+					 * read of this inferred module-global
+					 * resolves nil (`g.a`/`take(g)` → <nil>).
+					 * The general-inferred twin of the #11
+					 * [_]-array Sym repoint above. */
+					Sym *s = scope_lookup_local(c->cur,
+					    d->str);
+					if (s) s->type = d->type;
+				}
 				if (d->type && rt != ty_err && d->type != ty_err
 				    && !type_assignable(d->type, rt)
 				    && !arrlit_init_fits(c, d->type, d->rhs))
diff --git a/test/wcc/823_inferred_global_let.c b/test/wcc/823_inferred_global_let.c
new file mode 100644
index 00000000..eba66038
--- /dev/null
+++ b/test/wcc/823_inferred_global_let.c
@@ -0,0 +1,236 @@
+/*
+ * 823_inferred_global_let — an inferred-type (annotation-less) module-global
+ * `let g = <init>;` must type-resolve at every downstream read. cstage's
+ * module N_LET pass-2 (cmd/wcc/check.c) stamped `d->type` from the rhs but
+ * never repointed the Sym that pass-1 installed with the annotation-less NULL
+ * type — so every later N_IDENT read of the global resolved its type as nil:
+ *   `let n = 5; return n + 0`    → `arithmetic on non-numeric type`
+ *   `let g = pt{..}; g.a + g.b`  → `arithmetic on non-numeric type`
+ *   `let g = pt{..}; take(g)`    → `argument type <nil> not assignable to pt`
+ *
+ * The fix (cmd/w6c/cgen.c sibling check.c) mirrors the #11 [_]-array Sym
+ * repoint a few lines up: after `d->type = type_default(rt)`, repoint the
+ * Sym at the stamped type. cstage-ONLY — wwstage's single-pass resolve
+ * already stamps the inferred global (all three rows built clean pre-fix),
+ * so this LIFTS cstage from loud-reject to accept, converging acceptance.
+ * No asm moves for code that already built; the inferred form now reaches
+ * the same cgen as the explicit-typed form, so cstage==wwstage byte-id.
+ *
+ *   row           | shape                                       | want
+ *   --------------+---------------------------------------------+-----
+ *   scalar        | let n = 5; return n + 0    (broadest case)  | 5
+ *   struct_field  | let g = pt{a=7,b=9}; g.a + g.b              | 16
+ *   struct_arg    | let g = pt{a=5,b=9}; take(g) (rides #150-A) | 14
+ *
+ * All three are mutation-sane: pre-fix cstage loud-rejects each (the build
+ * fails), so a regression that drops the repoint re-louds and fails the row.
+ * The byte-id rows pin cstage==wwstage `.s` for the now-accepted inferred
+ * source.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+
+static int
+runwait(const char *cmd)
+{
+	int rc = system(cmd);
+	if (rc == -1) return -1;
+	if (WIFEXITED(rc)) return WEXITSTATUS(rc);
+	return -1;
+}
+
+struct row { const char *label; const char *src; int want; };
+
+static const struct row rows[] = {
+	/* scalar — the broadest case: an inferred scalar global read in
+	 * arithmetic. The read must flow through the repointed Sym's numeric
+	 * type; pre-fix cstage `arithmetic on non-numeric type` (a bare
+	 * `return n: i32` would NOT loud — the cast's target type masks the
+	 * nil Sym — so `+ 0` is the mutation-sane shape). */
+	{ "scalar",
+	  "package main;\n"
+	  "let n = 5;\n"
+	  "export fn main() i32 = {\n"
+	  "\treturn (n + 0): i32;\n"
+	  "};\n",
+	  5 },
+
+	/* struct_field — inferred struct global, both fields read. pre-fix
+	 * cstage `arithmetic on non-numeric type`. */
+	{ "struct_field",
+	  "package main;\n"
+	  "type pt = struct { a: int, b: int };\n"
+	  "let g = pt { a = 7, b = 9 };\n"
+	  "export fn main() i32 = {\n"
+	  "\treturn (g.a + g.b): i32;\n"
+	  "};\n",
+	  16 },
+
+	/* struct_arg — inferred struct global passed BY VALUE; rides the
+	 * #150 Commit A cgen marshalling. pre-fix cstage `argument type
+	 * <nil> not assignable to pt`. */
+	{ "struct_arg",
+	  "package main;\n"
+	  "type pt = struct { a: int, b: int };\n"
+	  "let g = pt { a = 5, b = 9 };\n"
+	  "fn take(x: pt) int = {\n"
+	  "\treturn x.a + x.b;\n"
+	  "};\n"
+	  "export fn main() i32 = {\n"
+	  "\treturn take(g): i32;\n"
+	  "};\n",
+	  14 },
+};
+
+static int
+run_driver(const char *driver, const struct row *r, int i)
+{
+	char src[64], tmpdir[64], cmd[1024];
+	snprintf(src, sizeof src, "/tmp/igl_%d_%d.ww", getpid(), i);
+	snprintf(tmpdir, sizeof tmpdir, "/tmp/igl_%d_d_%d", getpid(), i);
+
+	FILE *f = fopen(src, "wb");
+	if (!f) return -1;
+	fputs(r->src, f);
+	fclose(f);
+
+	mkdir(tmpdir, 0755);
+	snprintf(cmd, sizeof cmd, "cd %s && %s build %s 2>/dev/null",
+	    tmpdir, driver, src);
+	if (runwait(cmd) != 0) {
+		fprintf(stderr, "row[%s]: build via %s failed\n",
+		    r->label, driver);
+		unlink(src); rmdir(tmpdir);
+		return -1;
+	}
+
+	const char *base = strrchr(src, '/');
+	base = base ? base + 1 : src;
+	char outbin[128];
+	snprintf(outbin, sizeof outbin, "%s/%s", tmpdir, base);
+	char *dot = strrchr(outbin, '.');
+	if (dot && strcmp(dot, ".ww") == 0) *dot = '\0';
+	int got = runwait(outbin);
+
+	unlink(src); unlink(outbin); rmdir(tmpdir);
+	return got;
+}
+
+/* asm_byte_identical — w6c vs w6c_ww .s for the same source must match. */
+static int
+asm_byte_identical(const char *bin, const struct row *r, int i)
+{
+	char src[64], cs[64], ws[64], cmd[1024];
+	snprintf(src, sizeof src, "/tmp/igl_asm_%d_%d.ww", getpid(), i);
+	snprintf(cs,  sizeof cs,  "/tmp/igl_asm_%d_%d_c.s", getpid(), i);
+	snprintf(ws,  sizeof ws,  "/tmp/igl_asm_%d_%d_w.s", getpid(), i);
+
+	FILE *f = fopen(src, "wb");
+	if (!f) return -1;
+	fputs(r->src, f);
+	fclose(f);
+
+	snprintf(cmd, sizeof cmd, "%s/w6c -o %s %s 2>/dev/null", bin, cs, src);
+	if (runwait(cmd) != 0) {
+		fprintf(stderr, "row[%s]: w6c errored\n", r->label);
+		unlink(src);
+		return -1;
+	}
+	snprintf(cmd, sizeof cmd, "%s/w6c_ww -o %s %s 2>/dev/null",
+	    bin, ws, src);
+	if (runwait(cmd) != 0) {
+		fprintf(stderr, "row[%s]: w6c_ww errored\n", r->label);
+		unlink(src); unlink(cs);
+		return -1;
+	}
+
+	FILE *fc = fopen(cs, "rb");
+	FILE *fw = fopen(ws, "rb");
+	int rc = 0;
+	if (!fc || !fw) {
+		rc = -1;
+	} else {
+		for (;;) {
+			int a = fgetc(fc);
+			int b = fgetc(fw);
+			if (a != b) { rc = -1; break; }
+			if (a == EOF) break;
+		}
+	}
+	if (fc) fclose(fc);
+	if (fw) fclose(fw);
+	if (rc != 0)
+		fprintf(stderr, "row[%s]: cstage vs wwstage asm differs\n",
+		    r->label);
+	unlink(src); unlink(cs); unlink(ws);
+	return rc;
+}
+
+int
+main(void)
+{
+	const char *bin = getenv("BIN");
+	if (!bin) bin = "out/bin";
+	char absbin[1024];
+	if (bin[0] != '/') {
+		char cwd[1024];
+		if (getcwd(cwd, sizeof cwd) == NULL) return 1;
+		snprintf(absbin, sizeof absbin, "%s/%s", cwd, bin);
+		bin = absbin;
+	}
+
+	char cdrv[1024];
+	snprintf(cdrv, sizeof cdrv, "%s/ww", bin);
+	char wdrv[1024];
+	snprintf(wdrv, sizeof wdrv, "%s/ww_ww", bin);
+
+	struct { const char *name; const char *path; int gated_on_existence; }
+	drivers[] = {
+		{ "cstage",  cdrv, 0 },
+		{ "wwstage", wdrv, 1 },
+		{ NULL, NULL, 0 },
+	};
+
+	int n = (int)(sizeof rows / sizeof rows[0]);
+	int total = 0, fail = 0;
+
+	for (int d = 0; drivers[d].name; d++) {
+		if (drivers[d].gated_on_existence
+		    && access(drivers[d].path, X_OK) != 0) {
+			fprintf(stderr, "inferred_global_let: skip %s (no %s)\n",
+			    drivers[d].name, drivers[d].path);
+			continue;
+		}
+		for (int i = 0; i < n; i++) {
+			int got = run_driver(drivers[d].path, &rows[i], i);
+			total++;
+			if (got != rows[i].want) {
+				fprintf(stderr,
+				    "inferred_global_let[%s][%s]: exit=%d want=%d\n",
+				    drivers[d].name, rows[i].label,
+				    got, rows[i].want);
+				fail++;
+			}
+		}
+	}
+
+	if (access(wdrv, X_OK) == 0) {
+		for (int i = 0; i < n; i++) {
+			total++;
+			if (asm_byte_identical(bin, &rows[i], i) != 0)
+				fail++;
+		}
+	}
+
+	if (fail) {
+		fprintf(stderr,
+		    "inferred_global_let: %d/%d fixtures failed\n", fail, total);
+		return 1;
+	}
+	printf("inferred_global_let: %d/%d ok\n", total, total);
+	return 0;
+}