1 files changed, 3 insertions, 0 deletions

diff --git a/lopnames.h b/lopnames.h
index f20147e3..965cec9b 100644
--- a/lopnames.h
+++ b/lopnames.h
@@ -7,6 +7,9 @@
 #if !defined(lopnames_h)
 #define lopnames_h
 
+#include <stddef.h>
+
+
 /* ORDER OP */
 
 static const char *const opnames[] = {