diff --git a/configure b/configure
index ba38a7390653e947a47f465eb7711b4311c34552..a8b1f3fea5d7c77d2d8f6f18676f1b2cb20e7486 100755
--- a/configure
+++ b/configure
@@ -1040,7 +1040,7 @@ check_code(){
 check_cppflags(){
     log check_cppflags "$@"
     check_cpp "$@" <<EOF && append CPPFLAGS "$@"
-int x;
+#include <stdlib.h>
 EOF
 }
 
@@ -1424,7 +1424,7 @@ check_host_cpp(){
 check_host_cppflags(){
     log check_host_cppflags "$@"
     check_host_cpp "$@" <<EOF && append host_cppflags "$@"
-int x;
+#include <stdlib.h>
 EOF
 }