diff --git a/src/hardware/hw_main.c b/src/hardware/hw_main.c
index 3e113bd76..205fc3ff6 100644
--- a/src/hardware/hw_main.c
+++ b/src/hardware/hw_main.c
@@ -1478,7 +1478,8 @@ static void HWR_ProcessSeg(void) // Sort of like GLWall::Process in GZDoom
 					transnum_t transtable = R_GetLinedefTransTable(gl_linedef);
 					if (transtable == NUMTRANSMAPS)
 						transtable = 0;
-					if (gl_linedef->special == 910)
+					if (gl_linedef->special == 910 ||
+							P_IsLineTripWire(gl_linedef))
 						blend = AST_ADD;
 					else if (gl_linedef->special == 911)
 						blend = AST_SUBTRACT;
diff --git a/src/r_segs.c b/src/r_segs.c
index 8d056a295..5c9538e34 100644
--- a/src/r_segs.c
+++ b/src/r_segs.c
@@ -162,7 +162,7 @@ void R_RenderMaskedSegRange(drawseg_t *ds, INT32 x1, INT32 x2)
 		return;
 
 	transtable = R_GetLinedefTransTable(ldef);
-	if (ldef->special == 910)
+	if (ldef->special == 910 || P_IsLineTripWire(ldef))
 	{
 		if (transtable == NUMTRANSMAPS)
 			transtable = 0;