diff --git a/simplecpp.cpp b/simplecpp.cpp
index a24a3105..71f03199 100755
--- a/simplecpp.cpp
+++ b/simplecpp.cpp
@@ -402,7 +402,7 @@ class FileStream : public simplecpp::TokenList::Stream {
         init();
     }
 
-    ~FileStream() {
+    ~FileStream() OVERRIDE {
         fclose(file);
         file = nullptr;
     }