diff --git a/src/gwin/gwin.c b/src/gwin/gwin.c
index 7d0ecaeb..c5082ea0 100644
--- a/src/gwin/gwin.c
+++ b/src/gwin/gwin.c
@@ -282,7 +282,7 @@ void gwinBlitArea(GHandle gh, coord_t x, coord_t y, coord_t cx, coord_t cy, coor
 #endif
 
 #if GDISP_NEED_DUALCIRCLE
-	void gwinFillDualCircle(GHandle gh, coord_t x, coord_t y, coord_t radius1, color_t color1, coord_t radius2, color_t color2) {
+	void gwinFillDualCircle(GHandle gh, coord_t x, coord_t y, coord_t radius1, coord_t radius2) {
 		if (!_gwinDrawStart(gh)) return;
 		gdispGFillDualCircle(gh->display, gh->x+x, gh->y+y, radius1, gh->bgcolor, radius2, gh->color);
 		_gwinDrawEnd(gh);
diff --git a/src/gwin/gwin.h b/src/gwin/gwin.h
index e603f017..c3d18c31 100644
--- a/src/gwin/gwin.h
+++ b/src/gwin/gwin.h
@@ -729,13 +729,11 @@ extern "C" {
 		 * @param[in] gh		The window handle
 		 * @param[in] x,y		The center of the circle
 		 * @param[in] radius1	The radius of the larger circle
-		 * @param[in] color1	The color to use for the larger circle
 		 * @param[in] radius2	The radius of the smaller circle
-		 * @param[in] color2	The color to use for the smaller circle
 		 *
 		 * @api
 		 */
-		void gwinFillDualCircle(GHandle gh, coord_t x, coord_t y, coord_t radius1, color_t color1, coord_t radius2, color_t color2);
+		void gwinFillDualCircle(GHandle gh, coord_t x, coord_t y, coord_t radius1, coord_t radius2);
 	#endif
 
 	#if GDISP_NEED_ELLIPSE || defined(__DOXYGEN__)