diff --git a/packages/icons-webfont/.build/fix-outline.py b/packages/icons-webfont/.build/fix-outline.py
index 26d7bdc71..c15e8e0f6 100644
--- a/packages/icons-webfont/.build/fix-outline.py
+++ b/packages/icons-webfont/.build/fix-outline.py
@@ -1,4 +1,5 @@
 import os
+import sys
 import fontforge
 
 file = sys.argv[1]