--- a/configure.in
+++ b/configure.in
@@ -144,6 +144,7 @@ dnl We don'use
   CFLAGS="$CFLAGS"
   AC_CACHE_CHECK( "for gcc strength-reduce bug", ac_cv_c_gcc_strength_bug,
                   AC_TRY_RUN([
+#include <stdlib.h>
 int main(void) {
   static int Array[[3]];
   unsigned int B = 3;