diff --git a/base/services/umpnpmgr/install.c b/base/services/umpnpmgr/install.c
index afe3c9fc0ca..dae3e649254 100644
--- a/base/services/umpnpmgr/install.c
+++ b/base/services/umpnpmgr/install.c
@@ -369,7 +369,7 @@ DeviceInstallThread(LPVOID lpParameter)
 
     while (TRUE)
     {
-        UINT32 devListSize;
+        ULONG devListSize;
         DWORD status = PNP_GetDeviceListSize(NULL, NULL, &devListSize, 0);
         if (status != CR_SUCCESS)
         {