diff --git a/wa/framework/version.py b/wa/framework/version.py
index 2e1b8622..0dbb775c 100644
--- a/wa/framework/version.py
+++ b/wa/framework/version.py
@@ -46,7 +46,7 @@ def get_commit():
     p.wait()
     if p.returncode:
         return None
-    if sys.version_info[0] == 3 and isinstance(std, str):
+    if sys.version_info[0] == 3 and isinstance(std, bytes):
         return std[:8].decode(sys.stdout.encoding)
     else:
         return std[:8]