diff --git a/extras/conf/SRB2-22.cfg b/extras/conf/SRB2-22.cfg
index 608fe508f8fd8f6f62a33eb388dee6dde6d85e46..bcb823aa3d7720065390b3becf16866c87b51330 100644
--- a/extras/conf/SRB2-22.cfg
+++ b/extras/conf/SRB2-22.cfg
@@ -2000,6 +2000,7 @@ linedeftypes
 			title = "Set Tagged Sector's Ceiling Height/Texture";
 			prefix = "(401)";
 			flags8text = "[3] Set delay by backside sector";
+			flags64text = "[6] Keep floor flat";
 		}
 
 		402
diff --git a/src/p_setup.c b/src/p_setup.c
index 27bfdc4c942ec5dbce33022e2d40b175f319f12a..1e65a2dfd9d4db9b97ba915395ff6a2f7c7e68a6 100644
--- a/src/p_setup.c
+++ b/src/p_setup.c
@@ -3622,7 +3622,7 @@ static void P_ConvertBinaryMap(void)
 		case 401: //Set tagged sector's ceiling height/texture
 			lines[i].args[0] = tag;
 			lines[i].args[1] = lines[i].special - 400;
-			lines[i].args[2] = !!(lines[i].flags & ML_NOCLIMB);
+			lines[i].args[2] = !(lines[i].flags & ML_NOCLIMB);
 			lines[i].special = 400;
 			break;
 		case 403: //Move tagged sector's floor