1 files changed, 1 insertions, 0 deletions
diff --git a/Configure b/Configure
index 10b5331bac..3f3d24b8ef 100755
--- a/Configure
+++ b/Configure
@@ -6847,6 +6847,7 @@ echo "Checking the availability of certain socket constants..." >& 4
 for ENUM in MSG_CTRUNC MSG_DONTROUTE MSG_OOB MSG_PEEK MSG_PROXY SCM_RIGHTS; do
 	enum=`$echo $ENUM|./tr '[A-Z]' '[a-z]'`
 	$cat >try.c <<EOF
+#include <sys/types.h>
 #include <sys/socket.h>
 int main() {
     int i = $ENUM;