diff --git a/src/p_setup.c b/src/p_setup.c
index 0f16a94bf..c8044fbd7 100644
--- a/src/p_setup.c
+++ b/src/p_setup.c
@@ -5123,6 +5123,10 @@ static void P_ConvertBinaryLinedefTypes(void)
 
 				if (lines[i].flags & ML_MIDPEG)
 					sectors[s].flags |= MSF_TRIGGERSPECIAL_TOUCH;
+
+				if (mapnamespace == MNS_SRB2KART)
+					continue; // the below doesn't exist in kart
+
 				if (lines[i].flags & ML_NOSKEW)
 					sectors[s].flags |= MSF_TRIGGERSPECIAL_HEADBUMP;
 
diff --git a/src/p_slopes.c b/src/p_slopes.c
index 8c6833eee..f9c8f4a7f 100644
--- a/src/p_slopes.c
+++ b/src/p_slopes.c
@@ -689,6 +689,7 @@ static void line_SpawnViaMapthingVertexes(const int linenum, const boolean spawn
 	case TMSP_BACKCEILING:
 		slopetoset = &line->backsector->c_slope;
 		side = &sides[line->sidenum[1]];
+		break; // this break did not exist between 2019-04-19 and 2023-08-18. let that sink in.
 	default:
 		return;
 	}