diff --git a/src/v_video.cpp b/src/v_video.cpp
index 999e74c467..f1f218f279 100644
--- a/src/v_video.cpp
+++ b/src/v_video.cpp
@@ -550,7 +550,7 @@ void V_UpdateModeSize (int width, int height)
 
 	// This reference size is being used so that on 800x450 (small 16:9) a scale of 2 gets used.
 
-	CleanXfac = std::min(screen->GetWidth() / 400, screen->GetHeight() / 240);
+	CleanXfac = std::max(std::min(screen->GetWidth() / 400, screen->GetHeight() / 240), 1);
 	if (CleanXfac >= 4) CleanXfac--;	// Otherwise we do not have enough space for the episode/skill menus in some languages.
 	CleanYfac = CleanXfac;
 	CleanWidth = screen->GetWidth() / CleanXfac;
diff --git a/wadsrc/static/menudef.txt b/wadsrc/static/menudef.txt
index 42dbd7fe51..3d99a94442 100644
--- a/wadsrc/static/menudef.txt
+++ b/wadsrc/static/menudef.txt
@@ -2189,7 +2189,6 @@ OptionMenu CustomResolutionMenu protected
 	StaticText "$VIDMNU_RESPRESETHEAD"
 	StaticText ""
 	StaticText "$VIDMNU_ASPECT43"
-	Command "320x240", "menu_resolution_set_custom 320 240"
 	Command "640x480", "menu_resolution_set_custom 640 480"
 	Command "1024x768", "menu_resolution_set_custom 1024 768"
 	Command "1280x960", "menu_resolution_set_custom 1280 960"