diff --git a/desktop_version/src/ButtonGlyphs.cpp b/desktop_version/src/ButtonGlyphs.cpp
index 229a0e32..3060fd42 100644
--- a/desktop_version/src/ButtonGlyphs.cpp
+++ b/desktop_version/src/ButtonGlyphs.cpp
@@ -274,7 +274,7 @@ const char* BUTTONGLYPHS_get_wasd_text(void)
 
 const char* BUTTONGLYPHS_sdlbutton_to_glyph(const SDL_GameControllerButton button)
 {
-    if (button > SDL_CONTROLLER_BUTTON_RIGHTSHOULDER)
+    if (button < 0 || button > SDL_CONTROLLER_BUTTON_RIGHTSHOULDER)
     {
         SDL_assert(0 && "Unhandled button!");
         return glyph[GLYPH_UNKNOWN];