diff --git a/tools/gyp/pylib/gyp/generator/ninja.py b/tools/gyp/pylib/gyp/generator/ninja.py
index 3658fb6be79799..7d1d3b7b30b5f1 100644
--- a/tools/gyp/pylib/gyp/generator/ninja.py
+++ b/tools/gyp/pylib/gyp/generator/ninja.py
@@ -20,7 +20,7 @@
 import gyp.msvs_emulation
 import gyp.MSVSUtil as MSVSUtil
 import gyp.xcode_emulation
-from cStringIO import StringIO
+from io import StringIO
 
 from gyp.common import GetEnvironFallback
 import gyp.ninja_syntax as ninja_syntax