1 files changed, 3 insertions, 2 deletions
diff --git a/src/live_effects/parameter/enum.h b/src/live_effects/parameter/enum.h
index 2a1b07b47..2340663c3 100644
--- a/src/live_effects/parameter/enum.h
+++ b/src/live_effects/parameter/enum.h
@@ -68,8 +68,9 @@ public:
         return value;
     }
 
-    inline operator E()
-        { return value; };
+    inline operator E() const {
+        return value;
+    };
 
     void param_set_default() {
         param_set_value(defvalue);