diff --git a/embed/extmod/modtrezorui/display-unix.h b/embed/extmod/modtrezorui/display-unix.h
index cc14e569..5f6b4da9 100644
--- a/embed/extmod/modtrezorui/display-unix.h
+++ b/embed/extmod/modtrezorui/display-unix.h
@@ -57,7 +57,7 @@ int display_init(void)
     }
     SDL_SetRenderDrawColor(RENDERER, DISPLAY_BACKLIGHT, DISPLAY_BACKLIGHT, DISPLAY_BACKLIGHT, 255);
     SDL_RenderClear(RENDERER);
-    BUFFER = SDL_CreateRGBSurface(0, DISPLAY_RESX, DISPLAY_RESY, 16, 0xF800, 0x07E0, 0x001F, 0x0000);
+    BUFFER = SDL_CreateRGBSurface(0, MAX_DISPLAY_RESX, MAX_DISPLAY_RESY, 16, 0xF800, 0x07E0, 0x001F, 0x0000);
     TEXTURE = SDL_CreateTexture(RENDERER, SDL_PIXELFORMAT_RGB565, SDL_TEXTUREACCESS_STREAMING, DISPLAY_RESX, DISPLAY_RESY);
     SDL_SetTextureBlendMode(TEXTURE, SDL_BLENDMODE_NONE);
     SDL_SetTextureAlphaMod(TEXTURE, 0);