diff --git a/core/extension/gdextension.cpp b/core/extension/gdextension.cpp
index 05ba114a965..258b01542e2 100644
--- a/core/extension/gdextension.cpp
+++ b/core/extension/gdextension.cpp
@@ -154,7 +154,7 @@ public:
 	}
 
 	virtual bool is_vararg() const override {
-		return false;
+		return vararg;
 	}
 
 #ifdef TOOLS_ENABLED