diff --git a/m4/package_libcdev.m4 b/m4/package_libcdev.m4
index 6db1177..4ef7e8f 100644
--- a/m4/package_libcdev.m4
+++ b/m4/package_libcdev.m4
@@ -112,7 +112,7 @@
           need_internal_statx=yes,
           [#include <linux/stat.h>]
         )
-      ],,
+      ],need_internal_statx=yes,
       [#include <linux/stat.h>]
     )
     AC_SUBST(need_internal_statx)