diff --git a/CorsixTH/Src/th_gfx_sdl.cpp b/CorsixTH/Src/th_gfx_sdl.cpp
index d3e228b..f55c6bf 100644
--- a/CorsixTH/Src/th_gfx_sdl.cpp
+++ b/CorsixTH/Src/th_gfx_sdl.cpp
@@ -78,11 +78,11 @@ static inline uint32_t makeSwapRedBlue(uint8_t iOpacity, uint8_t iR, uint8_t iG,
     // Simple swapping channels will thus distort the balance. This code compensates for that by computing
     // red  = blue * 0.0722 / 0.2126 = blue * 1083 / 3189
     // blue = red  * 0.2126 / 0.0722 = red  * 1063 / 361 (clipped at max blue, 255)
-    uint8_t iNewRed = (unsigned int)iB * 1083 / 3189;
-    unsigned int iNewBlue = (unsigned int)iR * 1063 / 361;
+    uint8_t iNewRed = static_cast<uint8_t>(iB * 1083 / 3189);
+    int iNewBlue = iR * 1063 / 361;
     if (iNewBlue > 255)
         iNewBlue = 255;
-    return THPalette::packARGB(iOpacity, iNewRed, iG, iNewBlue);
+    return THPalette::packARGB(iOpacity, iNewRed, iG, static_cast<uint8_t>(iNewBlue));
 }
 
 bool FullColourRenderer::decodeImage(const unsigned char* pImg, const THPalette *pPalette, uint32_t iSpriteFlags)
diff --git a/CorsixTH/Src/th_lua_anims.cpp b/CorsixTH/Src/th_lua_anims.cpp
index 293b9c8..dc08604 100644
--- a/CorsixTH/Src/th_lua_anims.cpp
+++ b/CorsixTH/Src/th_lua_anims.cpp
@@ -150,7 +150,7 @@ static int l_anims_set_alt_pal(lua_State *L)
     const unsigned char *pPal = luaT_checkfile(L, 3, &iPalLen);
     if(iPalLen != 256)
         return luaL_typerror(L, 3, "GhostPalette string");
-    uint32_t iAlt32 = luaL_checkint(L, 4);
+    uint32_t iAlt32 = static_cast<uint32_t>(luaL_checkinteger(L, 4));                                                      
                                                                                                                            
     pAnims->setAnimationAltPaletteMap(iAnimation, pPal, iAlt32);