diff --git a/os/storage/antelope/aql-lexer.c b/os/storage/antelope/aql-lexer.c
index cad604efb..4bdefecf2 100644
--- a/os/storage/antelope/aql-lexer.c
+++ b/os/storage/antelope/aql-lexer.c
@@ -42,6 +42,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <strings.h>
 
 struct keyword {
   char *string;