diff --git a/sapi/apache/config.m4 b/sapi/apache/config.m4
index 0e6a7aff39f..4f1a65b2c9b 100644
--- a/sapi/apache/config.m4
+++ b/sapi/apache/config.m4
@@ -3,7 +3,7 @@ dnl ## -*- sh -*-
 AC_DEFUN(PHP_APACHE_CHECK_RDYNAMIC,[
   if test -n "$GCC"; then
     dnl we should use a PHP-specific macro here
-    TSRM_CHECK_GCC_ARG(-rdynamic, gcc_rdynamic)
+    TSRM_CHECK_GCC_ARG(-rdynamic, gcc_rdynamic=yes)
     if test "$gcc_rdynamic" = "yes"; then
       PHP_LDFLAGS="$PHP_LDFLAGS -rdynamic"
     fi