diff --git a/pgfw/extension.py b/pgfw/extension.py
index c621a26..2dc5f3d 100644
--- a/pgfw/extension.py
+++ b/pgfw/extension.py
@@ -172,7 +172,7 @@ def get_hue_shifted_surface(base, offset):
         for y in xrange(surface.get_height()):
             h, s, l, a = Color(*surface.unmap_rgb(pixels[x][y])).hsla
             if a:
-                color.hsla = (h + offset) % 360, s, l, a
+                color.hsla = (int(h) + offset) % 360, int(s), int(l), int(a)
                 pixels[x][y] = color
     del pixels
     return surface