diff --git a/src/gl/scene/gl_drawinfo.cpp b/src/gl/scene/gl_drawinfo.cpp
index 4dba1a2a0..72e0c8d1d 100644
--- a/src/gl/scene/gl_drawinfo.cpp
+++ b/src/gl/scene/gl_drawinfo.cpp
@@ -767,11 +767,11 @@ void GLDrawList::DrawSorted()
 		sorted=DoSort(SortNodes[SortNodeStart]);
 	}
 	gl_RenderState.ClearClipSplit();
+	glEnable(GL_CLIP_DISTANCE1);
 	glEnable(GL_CLIP_DISTANCE2);
-	glEnable(GL_CLIP_DISTANCE3);
 	DoDrawSorted(sorted);
+	glDisable(GL_CLIP_DISTANCE1);
 	glDisable(GL_CLIP_DISTANCE2);
-	glDisable(GL_CLIP_DISTANCE3);
 	gl_RenderState.ClearClipSplit();
 }
 
diff --git a/wadsrc/static/shaders/glsl/main.vp b/wadsrc/static/shaders/glsl/main.vp
index 0aef2d35a..827644eea 100644
--- a/wadsrc/static/shaders/glsl/main.vp
+++ b/wadsrc/static/shaders/glsl/main.vp
@@ -54,6 +54,6 @@ void main()
 		gl_ClipDistance[0] = uClipHeightTop - worldcoord.y;
 	}
 	
-	gl_ClipDistance[2] = worldcoord.y - uClipSplit.x;
-	gl_ClipDistance[3] = uClipSplit.y - worldcoord.y;
+	gl_ClipDistance[1] = worldcoord.y - uClipSplit.x;
+	gl_ClipDistance[2] = uClipSplit.y - worldcoord.y;
 }