diff --git a/CMakeLists.txt b/CMakeLists.txt
index c913260d..d4a2a493 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -100,7 +100,7 @@ IF(CMAKE_COMPILER_IS_GNUCXX OR MINGW)
 	IF(WIN32)
 		ADD_DEFINITIONS("-D_WINDOWS -D_WIN32 -D_STDCALL_SUPPORTED -D_M_IX86 -DXML_LIBRARY -D_LIB -DUSE_STREFLOP -DSTREFLOP_SSE -DSTREFLOP_RANDOM_GEN_SIZE=32 -DLIBM_COMPILING_FLT32 -DCURL_STATICLIB")
 	ELSE()
-		ADD_DEFINITIONS("-DCURL_STATICLIB")
+		ADD_DEFINITIONS("-DUSE_STREFLOP -DSTREFLOP_SSE -DSTREFLOP_RANDOM_GEN_SIZE=32 -DLIBM_COMPILING_FLT32 -DCURL_STATICLIB")
 	ENDIF()
 
 ENDIF()
diff --git a/source/glest_game/world/map.cpp b/source/glest_game/world/map.cpp
index dee6fa5d..318165b3 100644
--- a/source/glest_game/world/map.cpp
+++ b/source/glest_game/world/map.cpp
@@ -1109,11 +1109,12 @@ void Map::smoothSurface(Tileset *tileset) {
 			float numUsedToSmooth = 0.f;
 			for (int k = -1; k <= 1; ++k) {
 				for (int l = -1; l <= 1; ++l) {
-					if (cliffLevel<=0.1f || cliffLevel > abs(oldHeights[(j) * surfaceW + (i)]
+					if (cliffLevel<=0.1f || cliffLevel > fabs(oldHeights[(j) * surfaceW + (i)]
 							- oldHeights[(j + k) * surfaceW + (i + l)])) {
 						height += oldHeights[(j + k) * surfaceW + (i + l)];
 						numUsedToSmooth++;
-					} else {
+					}
+					else {
 						// we have something which should not be smoothed!
 						// This is a cliff and must be textured -> set cliff texture
 						getSurfaceCell(i, j)->setSurfaceType(5);
diff --git a/source/shared_lib/sources/map/map_preview.cpp b/source/shared_lib/sources/map/map_preview.cpp
index 76fe1b67..4e8831ea 100644
--- a/source/shared_lib/sources/map/map_preview.cpp
+++ b/source/shared_lib/sources/map/map_preview.cpp
@@ -71,7 +71,7 @@ bool MapPreview::isCliff(int x, int y){
 			if(xToCheck < 0 || yToCheck < 0 || xToCheck >= w || yToCheck >= h){
 				//ignore
 			}
-			else if(cliffLevel <= abs(getHeight(x, y) - getHeight(xToCheck, yToCheck))){
+			else if(cliffLevel <= abs((int)(getHeight(x, y) - getHeight(xToCheck, yToCheck)))) {
 				return true;
 			}
 		}