diff --git a/components/ratgdo/ratgdo.h b/components/ratgdo/ratgdo.h
index 4170b3e..dd5b042 100644
--- a/components/ratgdo/ratgdo.h
+++ b/components/ratgdo/ratgdo.h
@@ -36,7 +36,7 @@ namespace ratgdo {
     typedef struct {
         uint64_t fixed;
         uint32_t data;
-        bool operator!=(const command a) const
+        inline bool operator!=(const command &a) const
         {
             return (fixed != a.fixed || data != a.data);
         }