diff --git a/src/v_draw.cpp b/src/v_draw.cpp
index 9b78c5054..accded557 100644
--- a/src/v_draw.cpp
+++ b/src/v_draw.cpp
@@ -966,9 +966,8 @@ DEFINE_ACTION_FUNCTION(_Screen, DrawLine)
 	PARAM_INT(x1);
 	PARAM_INT(y1);
 	PARAM_INT(color);
-	PARAM_INT_DEF(palcol);
 	if (!screen->HasBegun2D()) ThrowAbortException(X_OTHER, "Attempt to draw to screen outside a draw function");
-	screen->DrawLine(x0, y0, x1, y1, palcol, color);
+	screen->DrawLine(x0, y0, x1, y1, -1, color);
 	return 0;
 }
 
diff --git a/wadsrc/static/zscript/base.txt b/wadsrc/static/zscript/base.txt
index f8c713453..9c21916c5 100644
--- a/wadsrc/static/zscript/base.txt
+++ b/wadsrc/static/zscript/base.txt
@@ -167,7 +167,7 @@ struct Screen native
 	native static vararg void DrawTexture(TextureID tex, bool animate, double x, double y, ...);
 	native static vararg void DrawChar(Font font, int normalcolor, double x, double y, int character, ...);
 	native static vararg void DrawText(Font font, int normalcolor, double x, double y, String text, ...);
-	native static void DrawLine(int x0, int y0, int x1, int y1, Color color, int palcolor = -1);
+	native static void DrawLine(int x0, int y0, int x1, int y1, Color color);
 	native static void DrawFrame(int x, int y, int w, int h);
 	native static Vector2, Vector2 VirtualToRealCoords(Vector2 pos, Vector2 size, Vector2 vsize, bool vbottom=false, bool handleaspect=true);
 	native static double GetAspectRatio();