diff --git a/src/servers/app/Screen.cpp b/src/servers/app/Screen.cpp
index 0fc58008bd..9ae34015e6 100644
--- a/src/servers/app/Screen.cpp
+++ b/src/servers/app/Screen.cpp
@@ -265,7 +265,7 @@ Screen::_FindBestMode(const display_mode* modes, uint32 count,
 		// TODO: check if these scores make sense
 		int32 diff = 1000 * abs(mode.timing.v_display - height)
 			+ int32(fabs(get_mode_frequency(mode) - frequency) * 10)
-			+ 100 * abs(mode.space - colorSpace);
+			+ 100 * abs((int)(mode.space - colorSpace));
 
 		if (bestIndex == -1 || diff < bestDiff) {
 			bestDiff = diff;
diff --git a/src/servers/app/drawing/interface/local/AccelerantHWInterface.cpp b/src/servers/app/drawing/interface/local/AccelerantHWInterface.cpp
index 13d45e0577..078ce55ad7 100644
--- a/src/servers/app/drawing/interface/local/AccelerantHWInterface.cpp
+++ b/src/servers/app/drawing/interface/local/AccelerantHWInterface.cpp
@@ -501,10 +501,10 @@ AccelerantHWInterface::_FindBestMode(const display_mode& compareMode,
 			+ abs(mode.timing.h_total * mode.timing.v_total
 					- compareMode.timing.h_total * compareMode.timing.v_total)
 				/ 100
-			+ abs(mode.timing.pixel_clock - compareMode.timing.pixel_clock)
+			+ abs((int)(mode.timing.pixel_clock - compareMode.timing.pixel_clock))
 				/ 100
 			+ (int32)(500 * fabs(aspectRatio - compareAspectRatio))
-			+ 100 * abs(mode.space - compareMode.space);
+			+ 100 * abs((int)(mode.space - compareMode.space));
 
 		if (bestIndex == -1 || diff < bestDiff) {
 			bestDiff = diff;