diff --git a/loader/windows/icd_windows.c b/loader/windows/icd_windows.c
index 44a8a98f..688c2218 100644
--- a/loader/windows/icd_windows.c
+++ b/loader/windows/icd_windows.c
@@ -111,8 +111,8 @@ static WinLayer* pWinLayerCapacity;
 
 static int __cdecl compareLayer(const void *a, const void *b)
 {
-    return ((WinLayer *)a)->priority < ((WinLayer *)b)->priority ? -1 :
-           ((WinLayer *)a)->priority > ((WinLayer *)b)->priority ? 1 : 0;
+    return ((const WinLayer *)a)->priority < ((const WinLayer *)b)->priority ? -1 :
+           ((const WinLayer *)a)->priority > ((const WinLayer *)b)->priority ? 1 : 0;
 }
 
 static BOOL layerAdd(const char* szName, DWORD priority)