diff --git a/gclient.py b/gclient.py
index 165475098..ea58e96f4 100755
--- a/gclient.py
+++ b/gclient.py
@@ -181,6 +181,10 @@ class Hook(object):
   def name(self):
     return self._name
 
+  @property
+  def condition(self):
+    return self._condition
+
   def matches(self, file_list):
     """Returns true if the pattern matches any of files in the list."""
     if not self._pattern:
@@ -2042,6 +2046,8 @@ def _HooksToLines(name, hooks):
       s.append('    "name": "%s",' % hook.name)
     if hook.pattern is not None:
       s.append('    "pattern": "%s",' % hook.pattern)
+    if hook.condition is not None:
+      s.append('    "condition": "%s",' % hook.condition)
     s.extend(
         # Hooks run in the parent directory of their dep.
         ['    "cwd": "%s",' % os.path.normpath(os.path.dirname(dep.name))] +
@@ -2069,6 +2075,8 @@ def _HooksOsToLines(hooks_os):
         s.append('      "name": "%s",' % hook.name)
       if hook.pattern is not None:
         s.append('      "pattern": "%s",' % hook.pattern)
+      if hook.condition is not None:
+        s.append('    "condition": "%s",' % hook.condition)
       s.extend(
           # Hooks run in the parent directory of their dep.
           ['      "cwd": "%s",' % os.path.normpath(os.path.dirname(dep.name))] +
diff --git a/testing_support/fake_repos.py b/testing_support/fake_repos.py
index 16f6a78c5..b6c2b8766 100755
--- a/testing_support/fake_repos.py
+++ b/testing_support/fake_repos.py
@@ -518,6 +518,7 @@ deps_os ={
 hooks = [
   {
     'pattern': '.',
+    'condition': 'True',
     'action': ['python', '-c',
                'open(\\'src/git_hooked1\\', \\'w\\').write(\\'{hook1_contents}\\')'],
   },
diff --git a/tests/gclient_smoketest.py b/tests/gclient_smoketest.py
index 869393481..e924a386d 100755
--- a/tests/gclient_smoketest.py
+++ b/tests/gclient_smoketest.py
@@ -703,6 +703,7 @@ class GClientSmokeGIT(GClientSmokeBase):
         '  # src',
         '  {',
         '    "pattern": ".",',
+        '    "condition": "True",',
         '    "cwd": ".",',
         '    "action": [',
         '        "python",',
@@ -867,6 +868,7 @@ class GClientSmokeGIT(GClientSmokeBase):
         '  # src',
         '  {',
         '    "pattern": ".",',
+        '    "condition": "True",',
         '    "cwd": ".",',
         '    "action": [',
         '        "python",',