diff --git a/gclient_scm.py b/gclient_scm.py
index 33293ab..717ffb7 100644
--- a/gclient_scm.py
+++ b/gclient_scm.py
@@ -22,6 +22,7 @@
 import gclient_utils
 import git_common
 import scm
+import scm_p4
 import subprocess2
 
 # TODO: Should fix these warnings.