diff --git a/src/menu/videomenu.cpp b/src/menu/videomenu.cpp
index 59f794fc02..1328e2f7a9 100644
--- a/src/menu/videomenu.cpp
+++ b/src/menu/videomenu.cpp
@@ -85,7 +85,7 @@ static BYTE BitTranslate[32];
 
 CUSTOM_CVAR (Int, menu_screenratios, -1, CVAR_ARCHIVE)
 {
-	if (self < -1 || self > 4)
+	if (self < -1 || self > 6)
 	{
 		self = -1;
 	}
@@ -216,7 +216,7 @@ static void BuildModesList (int hiwidth, int hiheight, int hi_bits)
 	bool letterbox=false;
 	int  ratiomatch;
 
-	if (menu_screenratios >= 0 && menu_screenratios <= 4)
+	if (menu_screenratios >= 0 && menu_screenratios <= 6)
 	{
 		ratiomatch = menu_screenratios;
 	}
diff --git a/wadsrc/static/menudef.txt b/wadsrc/static/menudef.txt
index a1f654b97f..19b5cd771c 100644
--- a/wadsrc/static/menudef.txt
+++ b/wadsrc/static/menudef.txt
@@ -1678,6 +1678,7 @@ OptionValue ForceRatios
 	5.0, "17:10"
 	2.0, "16:10"
 	4.0, "5:4"
+	6.0, "21:9"
 }
 OptionValue Ratios
 {
@@ -1685,6 +1686,7 @@ OptionValue Ratios
 	1.0, "16:9"
 	2.0, "16:10"
 	3.0, "17:10"
+	6.0, "21:9"
 	 -1, "$OPTVAL_ALL"
 }
 OptionValue RatiosTFT
@@ -1694,6 +1696,7 @@ OptionValue RatiosTFT
 	1.0, "16:9"
 	2.0, "16:10"
 	3.0, "17:10"
+	6.0, "21:9"
 	 -1, "$OPTVAL_ALL"
 }