diff --git a/common/core.h b/common/core.h
index 81b79ad..470bce0 100644
--- a/common/core.h
+++ b/common/core.h
@@ -54,5 +54,5 @@
 Status Disable_();
 Status Reenable_();
 
-void* stats_collection();
+void stats_collection();
 #endif