diff --git a/src/hle/rt64_application.cpp b/src/hle/rt64_application.cpp
index c8a0d33..dbd1c39 100644
--- a/src/hle/rt64_application.cpp
+++ b/src/hle/rt64_application.cpp
@@ -494,6 +494,9 @@ namespace RT64 {
             case SDL_SCANCODE_F4:
                 processDeveloperShortcut(DeveloperShortcut::Replacements);
                 return true;
+            default:
+                // Don't filter the key event.
+                break;
             }
         }
 
diff --git a/src/hle/rt64_application_window.cpp b/src/hle/rt64_application_window.cpp
index 8aeffde..c1c99e4 100644
--- a/src/hle/rt64_application_window.cpp
+++ b/src/hle/rt64_application_window.cpp
@@ -23,16 +23,7 @@ namespace RT64 {
     ApplicationWindow *ApplicationWindow::HookedApplicationWindow = nullptr;
     
     ApplicationWindow::ApplicationWindow() {
-        windowHandle = {};
-        sdlEventFilterUserdata = nullptr;
-        sdlEventFilterStored = false;
-        fullScreen = false;
-        lastMaximizedState = false;
-#   ifdef _WIN32
-        windowHook = nullptr;
-        windowMenu = nullptr;
-#   endif
-        usingSdl = false;
+        // Empty.
     }
 
     ApplicationWindow::~ApplicationWindow() {
diff --git a/src/hle/rt64_application_window.h b/src/hle/rt64_application_window.h
index bf6fefb..393d82a 100644
--- a/src/hle/rt64_application_window.h
+++ b/src/hle/rt64_application_window.h
@@ -31,12 +31,12 @@ namespace RT64 {
 #       endif
         };
 
-        RenderWindow windowHandle;
+        RenderWindow windowHandle = {};
         Listener *listener;
         uint32_t refreshRate = 0;
-        bool fullScreen;
-        bool lastMaximizedState;
-        bool usingSdl;
+        bool fullScreen = false;
+        bool lastMaximizedState = false;
+        bool usingSdl = false;
         int32_t windowLeft = INT32_MAX;
         int32_t windowTop = INT32_MAX;
         SDL_EventFilter sdlEventFilterStored = nullptr;
@@ -44,9 +44,9 @@ namespace RT64 {
         bool sdlEventFilterInstalled = false;
 
 #   ifdef _WIN32
-        HHOOK windowHook;
-        HMENU windowMenu;
-        RECT lastWindowRect;
+        HHOOK windowHook = nullptr;
+        HMENU windowMenu = nullptr;
+        RECT lastWindowRect = {};
 #   endif
 
         ApplicationWindow();