diff --git a/src/if_python3.c b/src/if_python3.c
index 374641d..300c24f 100644
--- a/src/if_python3.c
+++ b/src/if_python3.c
@@ -1649,8 +1649,8 @@
     }
 }
 
-    void
+    int
 set_ref_in_python3 (int copyID)
 {
-    set_ref_in_py(copyID);
+    int set_ref_in_py(copyID);
 }