diff --git a/configure b/configure
index e3713afd3e..e9725d4480 100755
--- a/configure
+++ b/configure
@@ -1670,6 +1670,7 @@ fi
 # xfsctl() probe, used for raw-posix
 if test "$xfs" != "no" ; then
   cat > $TMPC << EOF
+#include <stddef.h>  /* NULL */
 #include <xfs/xfs.h>
 int main(void)
 {