diff --git a/adafruit_pypixelbuf.py b/adafruit_pypixelbuf.py
index 1d88663..3081c7a 100644
--- a/adafruit_pypixelbuf.py
+++ b/adafruit_pypixelbuf.py
@@ -321,4 +321,6 @@ def fill(pixelbuf, color):
     pixelbuf.auto_write = False
     for i, _ in enumerate(pixelbuf):
         pixelbuf[i] = color
+    if auto_write:
+        pixelbuf.show()
     pixelbuf.auto_write = auto_write