diff --git a/libgcc/config/gthr-vxworks-tls.c b/libgcc/config/gthr-vxworks-tls.c
index 8987e55c35a..1d5c4fbb34d 100644
--- a/libgcc/config/gthr-vxworks-tls.c
+++ b/libgcc/config/gthr-vxworks-tls.c
@@ -115,7 +115,7 @@ extern void __gthread_set_tls_data (void *data);
 
 #endif
 
-#ifdef _VXWORKS_MAJOR_EQ(6)
+#if _VXWORKS_MAJOR_EQ(6)
 
 extern void __gthread_enter_tls_dtor_context (void);
 extern void __gthread_leave_tls_dtor_context (void);