diff --git a/UI/CwCheatScreen.cpp b/UI/CwCheatScreen.cpp
index e6ab4e4273..d3d11f2d14 100644
--- a/UI/CwCheatScreen.cpp
+++ b/UI/CwCheatScreen.cpp
@@ -126,7 +126,7 @@ UI::EventReturn CwCheatScreen::OnEnableAll(UI::EventParams &params)
 			cheatList[j].replace(0, 3, "_C0");
 		}
 	}
-	for (int y = 0; y < bEnableCheat.size(); y++) {
+	for (size_t y = 0; y < bEnableCheat.size(); y++) {
 		bEnableCheat[y] = enableAll;
 	}
 	for (int i = 0; i < (int)cheatList.size(); i++) {
diff --git a/UI/MiscScreens.cpp b/UI/MiscScreens.cpp
index 0b602a67cc..f9a5b88d2e 100644
--- a/UI/MiscScreens.cpp
+++ b/UI/MiscScreens.cpp
@@ -149,7 +149,7 @@ PostProcScreen::PostProcScreen(const std::string &title) : ListPopupScreen(title
 	shaders_ = GetAllPostShaderInfo();
 	std::vector<std::string> items;
 	int selected = -1;
-	for (int i = 0; i < shaders_.size(); i++) {
+	for (int i = 0; i < (int)shaders_.size(); i++) {
 		if (shaders_[i].section == g_Config.sPostShaderName)
 			selected = i;
 		items.push_back(shaders_[i].name);
diff --git a/Windows/WndMainWindow.cpp b/Windows/WndMainWindow.cpp
index 66c2e2dfde..06ed3c4a38 100644
--- a/Windows/WndMainWindow.cpp
+++ b/Windows/WndMainWindow.cpp
@@ -448,7 +448,7 @@ namespace MainWindow
 	void UpdateDynamicMenuCheckmarks() {
 		int item = ID_SHADERS_BASE + 1;
 
-		for (int i = 0; i < availableShaders.size(); i++)
+		for (size_t i = 0; i < availableShaders.size(); i++)
 			CheckMenuItem(menu, item++, ((g_Config.sPostShaderName == availableShaders[i]) ? MF_CHECKED : MF_UNCHECKED));
 	}