diff --git a/dlls/gdiplus/gdiplus.spec b/dlls/gdiplus/gdiplus.spec
index 5b046a1f4e7..eeda4bef1e4 100644
--- a/dlls/gdiplus/gdiplus.spec
+++ b/dlls/gdiplus/gdiplus.spec
@@ -222,8 +222,8 @@
 @ stdcall GdipFillPath(ptr ptr ptr)
 @ stdcall GdipFillPie(ptr ptr long long long long long long)
 @ stdcall GdipFillPieI(ptr ptr long long long long long long)
-@ stub GdipFillPolygon2
-@ stub GdipFillPolygon2I
+@ stdcall GdipFillPolygon2(ptr ptr ptr long)
+@ stdcall GdipFillPolygon2I(ptr ptr ptr long)
 @ stdcall GdipFillPolygon(ptr ptr ptr long long)
 @ stdcall GdipFillPolygonI(ptr ptr ptr long long)
 @ stdcall GdipFillRectangle(ptr ptr long long long long)
diff --git a/dlls/gdiplus/graphics.c b/dlls/gdiplus/graphics.c
index b6766d8b96e..4448b6a4f9b 100644
--- a/dlls/gdiplus/graphics.c
+++ b/dlls/gdiplus/graphics.c
@@ -2004,6 +2004,18 @@ end:
     return retval;
 }
 
+GpStatus WINGDIPAPI GdipFillPolygon2(GpGraphics *graphics, GpBrush *brush,
+    GDIPCONST GpPointF *points, INT count)
+{
+    return GdipFillPolygon(graphics, brush, points, count, FillModeAlternate);
+}
+
+GpStatus WINGDIPAPI GdipFillPolygon2I(GpGraphics *graphics, GpBrush *brush,
+    GDIPCONST GpPoint *points, INT count)
+{
+    return GdipFillPolygonI(graphics, brush, points, count, FillModeAlternate);
+}
+
 GpStatus WINGDIPAPI GdipFillRectangle(GpGraphics *graphics, GpBrush *brush,
     REAL x, REAL y, REAL width, REAL height)
 {