diff --git a/src/r_plane.cpp b/src/r_plane.cpp
index 0e8237cb68..75c308b5a8 100644
--- a/src/r_plane.cpp
+++ b/src/r_plane.cpp
@@ -1335,7 +1335,7 @@ void R_DrawSkyBoxes ()
 ADD_STAT(skyboxes)
 {
 	FString out;
-	out.Format (out, "%d skybox planes", numskyboxes);
+	out.Format ("%d skybox planes", numskyboxes);
 	return out;
 }