diff --git a/cmd/w6a/parse.c b/cmd/w6a/parse.c
index 66229c80..da1259ab 100644
--- a/cmd/w6a/parse.c
+++ b/cmd/w6a/parse.c
@@ -210,9 +210,9 @@ parse_operand(Asm *a, const char *s, Aoperand *out)
 
 	/* IDENT — register or symbol-or-label */
 	if (a_isidstart((unsigned char)*s)) {
-		char buf[64] = {0};
+		char buf[256] = {0};
 		int n = 0;
-		while (a_isidcont((unsigned char)*s) && n < 63) buf[n++] = *s++;
+		while (a_isidcont((unsigned char)*s) && n < 255) buf[n++] = *s++;
 		buf[n] = 0;
 
 		/* Optional `+disp` between the ident and `(SB)`. Used by
@@ -333,9 +333,9 @@ a_parse(Asm *a)
 
 		if (op == A_TEXT) {
 			/* TEXT name,$framesize */
-			char nbuf[64] = {0};
+			char nbuf[256] = {0};
 			int nn = 0;
-			while (*m && *m != ',' && nn < 63) nbuf[nn++] = *m++;
+			while (*m && *m != ',' && nn < 255) nbuf[nn++] = *m++;
 			prg->to.type = D_EXTERN;
 			prg->to.sym = strdup(nbuf);
 			if (*m == ',') {
@@ -347,9 +347,9 @@ a_parse(Asm *a)
 		} else if (op == A_DATA || op == A_DATAW) {
 			/* DATA  name(SB),"escaped bytes" — read-only in .text
 			 * DATAW name(SB),"escaped bytes" — writable in .data */
-			char nbuf[128] = {0};
+			char nbuf[256] = {0};
 			int nn = 0;
-			while (*m && *m != '(' && nn < 127) nbuf[nn++] = *m++;
+			while (*m && *m != '(' && nn < 255) nbuf[nn++] = *m++;
 			prg->to.type = D_EXTERN;
 			prg->to.sym = strdup(nbuf);
 			if (*m == '(') {