diff --git a/src/economy.cpp b/src/economy.cpp
index 2f12a070e2..9fbfee677e 100644
--- a/src/economy.cpp
+++ b/src/economy.cpp
@@ -1586,7 +1586,7 @@ static void LoadUnloadVehicle(Vehicle *v, int *cargo_left)
 			if (_patches.gradual_loading) cap = min(cap, load_amount);
 			if (_patches.improved_load) {
 				/* Don't load stuff that is already 'reserved' for other vehicles */
-				cap = min(cargo_left[v->cargo_type], cap);
+				cap = min((uint)cargo_left[v->cargo_type], cap);
 				cargo_left[v->cargo_type] -= cap;
 			}
 
diff --git a/src/roadveh_cmd.cpp b/src/roadveh_cmd.cpp
index 0ed011ce7d..fc7873deb9 100644
--- a/src/roadveh_cmd.cpp
+++ b/src/roadveh_cmd.cpp
@@ -97,7 +97,7 @@ int GetRoadVehImage(const Vehicle* v, Direction direction)
 	}
 
 	image = direction + _roadveh_images[img];
-	if (v->cargo.Count() >= v->cargo_cap / 2) image += _roadveh_full_adder[img];
+	if (v->cargo.Count() >= v->cargo_cap / 2U) image += _roadveh_full_adder[img];
 	return image;
 }
 
diff --git a/src/train_cmd.cpp b/src/train_cmd.cpp
index d2a12e2c0b..2fbe463e3e 100644
--- a/src/train_cmd.cpp
+++ b/src/train_cmd.cpp
@@ -463,7 +463,7 @@ int GetTrainImage(const Vehicle* v, Direction direction)
 
 	base = _engine_sprite_base[img] + ((direction + _engine_sprite_add[img]) & _engine_sprite_and[img]);
 
-	if (v->cargo.Count() >= v->cargo_cap / 2) base += _wagon_full_adder[img];
+	if (v->cargo.Count() >= v->cargo_cap / 2U) base += _wagon_full_adder[img];
 	return base;
 }