diff --git a/src/swrenderer/line/r_line.cpp b/src/swrenderer/line/r_line.cpp
index 5679b8e50..9398611cf 100644
--- a/src/swrenderer/line/r_line.cpp
+++ b/src/swrenderer/line/r_line.cpp
@@ -940,7 +940,7 @@ namespace swrenderer
 			{
 				wallshade = LIGHT2SHADE(curline->sidedef->GetLightLevel(foggy, frontsector->lightlevel)
 					+ r_actualextralight);
-				GlobVis = r_WallVisibility;
+				double GlobVis = r_WallVisibility;
 				rw_lightleft = float(GlobVis / WallC.sz1);
 				rw_lightstep = float((GlobVis / WallC.sz2 - rw_lightleft) / (WallC.sx2 - WallC.sx1));
 			}
diff --git a/src/swrenderer/plane/r_flatplane.h b/src/swrenderer/plane/r_flatplane.h
index c72b6402b..bd830f63b 100644
--- a/src/swrenderer/plane/r_flatplane.h
+++ b/src/swrenderer/plane/r_flatplane.h
@@ -33,6 +33,7 @@ namespace swrenderer
 		double planeheight;
 		bool plane_shade;
 		int planeshade;
+		double GlobVis;
 		fixed_t pviewx, pviewy;
 		fixed_t xscale, yscale;
 		double xstepscale, ystepscale;
diff --git a/src/swrenderer/scene/r_light.cpp b/src/swrenderer/scene/r_light.cpp
index e5cfb3f4f..7a45d9377 100644
--- a/src/swrenderer/scene/r_light.cpp
+++ b/src/swrenderer/scene/r_light.cpp
@@ -45,8 +45,6 @@ namespace swrenderer
 	double r_SpriteVisibility;
 	double r_ParticleVisibility;
 
-	double GlobVis;
-
 	FDynamicColormap *basecolormap; // [RH] colormap currently drawing with
 	int fixedlightlev;
 	FSWColormap *fixedcolormap;
diff --git a/src/swrenderer/scene/r_light.h b/src/swrenderer/scene/r_light.h
index eab64f094..e39b63067 100644
--- a/src/swrenderer/scene/r_light.h
+++ b/src/swrenderer/scene/r_light.h
@@ -57,8 +57,6 @@ namespace swrenderer
 	extern float r_TiltVisibility;
 	extern double r_SpriteVisibility;
 
-	extern double GlobVis;
-
 	extern int r_actualextralight;
 	extern bool foggy;
 	extern int fixedlightlev;
diff --git a/src/swrenderer/things/r_wallsprite.cpp b/src/swrenderer/things/r_wallsprite.cpp
index 2d1455a1a..e55b0fcc5 100644
--- a/src/swrenderer/things/r_wallsprite.cpp
+++ b/src/swrenderer/things/r_wallsprite.cpp
@@ -175,7 +175,7 @@ namespace swrenderer
 		}
 
 		int shade = LIGHT2SHADE(spr->sector->lightlevel + r_actualextralight);
-		GlobVis = r_WallVisibility;
+		double GlobVis = r_WallVisibility;
 		float lightleft = float(GlobVis / spr->wallc.sz1);
 		float lightstep = float((GlobVis / spr->wallc.sz2 - lightleft) / (spr->wallc.sx2 - spr->wallc.sx1));
 		float light = lightleft + (x1 - spr->wallc.sx1) * lightstep;