diff --git a/tccgen.c b/tccgen.c
index 136e4b80..84b9420c 100644
--- a/tccgen.c
+++ b/tccgen.c
@@ -8472,7 +8472,7 @@ found:
                             if (!esym)
                                 tcc_error("unsupported forward __alias__ attribute");
                             put_extern_sym2(sym, esym->st_shndx,
-                                            esym->st_value, esym->st_size, 0);
+                                            esym->st_value, esym->st_size, 1);
                         }
                     } else {
                         if (type.t & VT_STATIC)
diff --git a/tests/tests2/120_alias.c b/tests/tests2/120_alias.c
index c9eb2985..5bead0f5 100644
--- a/tests/tests2/120_alias.c
+++ b/tests/tests2/120_alias.c
@@ -6,7 +6,11 @@ void target(void) {
 }
 
 void alias_for_target(void) __attribute__((alias("target")));
+#ifdef __leading_underscore
+void asm_for_target(void) __asm__("_target");
+#else
 void asm_for_target(void) __asm__("target");
+#endif
 
 /* This is not supposed to compile, alias targets must be defined in the
    same unit.  In TCC they even must be defined before the reference