diff --git a/src/openrct2/CmdlineSprite.cpp b/src/openrct2/CmdlineSprite.cpp
index f60acb3134..0ffba4f236 100644
--- a/src/openrct2/CmdlineSprite.cpp
+++ b/src/openrct2/CmdlineSprite.cpp
@@ -262,7 +262,7 @@ static bool is_changable_pixel(sint32 palette_index) {
 }
 
 static sint32 get_closest_palette_index(sint16 *colour){
-    uint32 smallest_error = -1;
+    uint32 smallest_error = (uint32)-1;
     sint32 best_match = -1;
 
     for (sint32 x = 0; x < 256; x++){
@@ -272,7 +272,7 @@ static sint32 get_closest_palette_index(sint16 *colour){
                 ((sint16)(spriteFilePalette[x].g) - colour[1]) * ((sint16)(spriteFilePalette[x].g) - colour[1]) +
                 ((sint16)(spriteFilePalette[x].b) - colour[2]) * ((sint16)(spriteFilePalette[x].b) - colour[2]);
 
-            if (smallest_error == -1 || smallest_error > error){
+            if (smallest_error == (uint32)-1 || smallest_error > error){
                 best_match = x;
                 smallest_error = error;
             }
diff --git a/src/openrct2/Input.cpp b/src/openrct2/Input.cpp
index 255cebcb44..d46adcfd01 100644
--- a/src/openrct2/Input.cpp
+++ b/src/openrct2/Input.cpp
@@ -133,7 +133,7 @@ void game_handle_input()
 
     if (_inputFlags & INPUT_FLAG_5) {
         game_handle_input_mouse(x, y, state);
-    } else if (x != 0x80000000) {
+    } else if (x != (sint32)0x80000000) {
         sint32 screenWidth = context_get_width();
         sint32 screenHeight = context_get_height();
         x = Math::Clamp(0, x, screenWidth - 1);