diff --git a/tools/b64.c b/tools/b64.c
index 53c08e8..ba125f2 100644
--- a/tools/b64.c
+++ b/tools/b64.c
@@ -50,5 +50,6 @@ Main(Array *args, HashMap *env)
     StreamFlush(outStream);
     StreamClose(outStream); 
 
+    (void) env;
     return EXIT_SUCCESS;
 }