diff --git a/src/r_plane.cpp b/src/r_plane.cpp
index f1dc3a552..c3836b43e 100644
--- a/src/r_plane.cpp
+++ b/src/r_plane.cpp
@@ -761,7 +761,7 @@ void R_DrawSkyPlanes(void)
 
 	srb2::ThreadPool::Sema tp_sema;
 	srb2::g_main_threadpool->begin_sema();
-	for (i = 0; i < MAXVISPLANES; i++, pl++)
+	for (i = 0; i < MAXVISPLANES; i++)
 	{
 		for (pl = visplanes[i]; pl; pl = pl->next)
 		{
@@ -806,7 +806,7 @@ void R_DrawPlanes(void)
 
 	srb2::ThreadPool::Sema tp_sema;
 	srb2::g_main_threadpool->begin_sema();
-	for (i = 0; i < MAXVISPLANES; i++, pl++)
+	for (i = 0; i < MAXVISPLANES; i++)
 	{
 		for (pl = visplanes[i]; pl; pl = pl->next)
 		{