diff --git a/src/gl/system/gl_swframebuffer.cpp b/src/gl/system/gl_swframebuffer.cpp
index b6d163044..0d82aa221 100644
--- a/src/gl/system/gl_swframebuffer.cpp
+++ b/src/gl/system/gl_swframebuffer.cpp
@@ -2871,7 +2871,7 @@ void OpenGLSWFrameBuffer::FlatFill(int left, int top, int right, int bottom, FTe
 
 void OpenGLSWFrameBuffer::FillSimplePoly(FTexture *texture, FVector2 *points, int npoints,
 	double originx, double originy, double scalex, double scaley,
-	DAngle rotation, FDynamicColormap *colormap, int lightlevel)
+	DAngle rotation, FDynamicColormap *colormap, int lightlevel, int bottomclip)
 {
 	// Use an equation similar to player sprites to determine shade
 	double fadelevel = clamp((LIGHT2SHADE(lightlevel) / 65536. - 12) / NUMCOLORMAPS, 0.0, 1.0);
@@ -2892,7 +2892,7 @@ void OpenGLSWFrameBuffer::FillSimplePoly(FTexture *texture, FVector2 *points, in
 	}
 	if (In2D < 2)
 	{
-		Super::FillSimplePoly(texture, points, npoints, originx, originy, scalex, scaley, rotation, colormap, lightlevel);
+		Super::FillSimplePoly(texture, points, npoints, originx, originy, scalex, scaley, rotation, colormap, lightlevel, bottomclip);
 		return;
 	}
 	if (!InScene)
diff --git a/src/gl/system/gl_swframebuffer.h b/src/gl/system/gl_swframebuffer.h
index 226d8cca7..a4ba4e426 100644
--- a/src/gl/system/gl_swframebuffer.h
+++ b/src/gl/system/gl_swframebuffer.h
@@ -59,7 +59,7 @@ public:
 	void FlatFill(int left, int top, int right, int bottom, FTexture *src, bool local_origin) override;
 	void DrawLine(int x0, int y0, int x1, int y1, int palColor, uint32 realcolor) override;
 	void DrawPixel(int x, int y, int palcolor, uint32 rgbcolor) override;
-	void FillSimplePoly(FTexture *tex, FVector2 *points, int npoints, double originx, double originy, double scalex, double scaley, DAngle rotation, FDynamicColormap *colormap, int lightlevel) override;
+	void FillSimplePoly(FTexture *tex, FVector2 *points, int npoints, double originx, double originy, double scalex, double scaley, DAngle rotation, FDynamicColormap *colormap, int lightlevel, int bottomclip) override;
 	bool WipeStartScreen(int type) override;
 	void WipeEndScreen() override;
 	bool WipeDo(int ticks) override;