diff --git a/reactos/dll/win32/setupapi/devinst.c b/reactos/dll/win32/setupapi/devinst.c
index 93934e726d7..d4160b2936d 100644
--- a/reactos/dll/win32/setupapi/devinst.c
+++ b/reactos/dll/win32/setupapi/devinst.c
@@ -5777,6 +5777,8 @@ cleanup:
         RegCloseKey(hEnumKey);
     if (hKey != NULL && hKey != key)
         RegCloseKey(hKey);
+    if (DriverKey)
+        HeapFree(GetProcessHeap(), 0, DriverKey);
     return key;
 }