diff --git a/dll/win32/setupapi/cfgmgr.c b/dll/win32/setupapi/cfgmgr.c
index 98b09139b75..0a3035d6aea 100644
--- a/dll/win32/setupapi/cfgmgr.c
+++ b/dll/win32/setupapi/cfgmgr.c
@@ -1075,7 +1075,8 @@ CM_Add_Range(
     }
     else
     {
-
+        HeapFree(GetProcessHeap(), 0, pRange);
+        UNIMPLEMENTED;
     }
 
 done: