diff --git a/source3/configure.in b/source3/configure.in
index 1f56efe7a6a..42c4f5c74bd 100644
--- a/source3/configure.in
+++ b/source3/configure.in
@@ -493,6 +493,8 @@ exit(1);
        AC_TRY_RUN([
 #include <unistd.h>
 #include <sys/utsname.h>
+#include <string.h>
+#include <stdlib.h>
 main() {
 #if _LFS64_LARGEFILE == 1
        struct utsname uts;