diff --git a/gcc/libgcc2.c b/gcc/libgcc2.c
index 69cb7e47ad8..1d3f96cfd86 100644
--- a/gcc/libgcc2.c
+++ b/gcc/libgcc2.c
@@ -42,7 +42,7 @@ Boston, MA 02111-1307, USA.  */
 #undef abort
 #endif
 
-#if (SUPPORTS_WEAK == 1) && defined (ASM_OUTPUT_DEF)
+#if (SUPPORTS_WEAK == 1) && (defined (ASM_OUTPUT_DEF) || defined (ASM_OUTPUT_WEAK_ALIAS))
 #define WEAK_ALIAS
 #endif