diff --git a/decl.cpp b/decl.cpp
index c881c7e7..4ddc6219 100644
--- a/decl.cpp
+++ b/decl.cpp
@@ -44,6 +44,7 @@
 #include "stmt.h"
 #include "expr.h"
 #include <stdio.h>
+#include <string.h>
 #include <set>
 
 static void