diff --git a/windows-snapshot-tool/src/main.cpp b/windows-snapshot-tool/src/main.cpp
index 8c02b03..36b1813 100644
--- a/windows-snapshot-tool/src/main.cpp
+++ b/windows-snapshot-tool/src/main.cpp
@@ -69,8 +69,8 @@ int WINAPI WinMain (HINSTANCE hThisInstance,
 
     /* register hotkey. 0x59 is 'y' so win+y or print                                   *
      * see: https://docs.microsoft.com/de-de/windows/desktop/inputdev/virtual-key-codes */
-    if (!RegisterHotKey(Hwnd, WM_HOTKEY_FREEZE, MOD_WIN, 0x59)
-     || !RegisterHotKey(Hwnd, WM_HOTKEY_FREEZE, 0, 0x2c)) {
+    if (!RegisterHotKey(NULL, WM_HOTKEY_FREEZE, MOD_WIN, 0x59)
+     || !RegisterHotKey(NULL, WM_HOTKEY_FREEZE, 0, 0x2c)) {
         FatalAppExit(0, TEXT("Couldn't register hotkey!"));
     }