diff --git a/tccgen.c b/tccgen.c
index c6edcc3f..6c341e0c 100644
--- a/tccgen.c
+++ b/tccgen.c
@@ -995,7 +995,8 @@ static Sym *external_sym(int v, CType *type, int r, AttributeDef *ad)
 {
     Sym *s;
     s = sym_find(v);
-    if (!s || (!(s->type.t & VT_EXTERN) && (s->type.t & VT_BTYPE) != VT_FUNC)) {
+    if (!s || (!IS_ASM_SYM(s) && !(s->type.t & VT_EXTERN)
+               && (s->type.t & VT_BTYPE) != VT_FUNC)) {
         if (s && !is_compatible_types(&s->type, type))
             tcc_error("conflicting types for '%s'", get_tok_str(s->v, NULL));
         /* push forward reference */