diff --git a/src/swrenderer/drawers/r_draw.h b/src/swrenderer/drawers/r_draw.h
index cf8fb2c35..468ad6e2f 100644
--- a/src/swrenderer/drawers/r_draw.h
+++ b/src/swrenderer/drawers/r_draw.h
@@ -180,7 +180,4 @@ namespace swrenderer
 
 	void R_SetSpanTexture(FTexture *tex);
 	void R_SetSpanColormap(FDynamicColormap *colormap, int shade);
-
-	void R_MapTiltedPlane(int y, int x1);
-	void R_MapColoredPlane(int y, int x1);
 }
diff --git a/src/swrenderer/scene/r_plane.h b/src/swrenderer/scene/r_plane.h
index 740020209..e6f2dc2eb 100644
--- a/src/swrenderer/scene/r_plane.h
+++ b/src/swrenderer/scene/r_plane.h
@@ -107,6 +107,9 @@ void R_DrawNormalPlane (visplane_t *pl, double xscale, double yscale, fixed_t al
 void R_DrawTiltedPlane (visplane_t *pl, double xscale, double yscale, fixed_t alpha, bool additive, bool masked);
 void R_MapVisPlane (visplane_t *pl, void (*mapfunc)(int y, int x1));
 
+void R_MapTiltedPlane(int y, int x1);
+void R_MapColoredPlane(int y, int x1);
+
 visplane_t *R_FindPlane
 ( const secplane_t &height,
   FTextureID	picnum,