diff --git a/src/video/win32_v.cpp b/src/video/win32_v.cpp
index 3e200cc415..8dcab88e9c 100644
--- a/src/video/win32_v.cpp
+++ b/src/video/win32_v.cpp
@@ -740,7 +740,7 @@ static void FindResolutions()
 			uint j;
 
 			for (j = 0; j < n; j++) {
-				if (_resolutions[j].width == dm.dmPelsWidth && _resolutions[j].height == dm.dmPelsHeight) break;
+				if (_resolutions[j].width == (int)dm.dmPelsWidth && _resolutions[j].height == (int)dm.dmPelsHeight) break;
 			}
 
 			/* In the previous loop we have checked already existing/added resolutions if