diff --git a/python/mozbuild/mozbuild/config_status.py b/python/mozbuild/mozbuild/config_status.py
index 6da22f009f32..f18eb6670bfc 100644
--- a/python/mozbuild/mozbuild/config_status.py
+++ b/python/mozbuild/mozbuild/config_status.py
@@ -21,13 +21,16 @@ from mozbuild.base import MachCommandConditions
 from mozbuild.frontend.emitter import TreeMetadataEmitter
 from mozbuild.frontend.reader import BuildReader
 from mozbuild.mozinfo import write_mozinfo
-from mozbuild.util import FileAvoidWrite
 from itertools import chain
 
 from mozbuild.backend import (
     backends,
     get_backend_class,
 )
+from mozbuild.util import (
+    FileAvoidWrite,
+    process_time,
+)
 
 
 log_manager = LoggingManager()
@@ -117,7 +120,7 @@ def config_status(topobjdir='.', topsrcdir='.', defines=None,
     with FileAvoidWrite(os.path.join(topobjdir, 'mozinfo.json')) as f:
         write_mozinfo(f, env, os.environ)
 
-    cpu_start = time.clock()
+    cpu_start = process_time()
     time_start = time.time()
 
     # Make appropriate backend instances, defaulting to RecursiveMakeBackend,
@@ -153,7 +156,7 @@ def config_status(topobjdir='.', topsrcdir='.', defines=None,
             summary = obj.gyp_summary()
             print(summary, file=sys.stderr)
 
-    cpu_time = time.clock() - cpu_start
+    cpu_time = process_time() - cpu_start
     wall_time = time.time() - time_start
     efficiency = cpu_time / wall_time if wall_time else 100
     untracked = wall_time - execution_time
diff --git a/python/mozbuild/mozbuild/util.py b/python/mozbuild/mozbuild/util.py
index 5b9b94033705..0547cd591cec 100644
--- a/python/mozbuild/mozbuild/util.py
+++ b/python/mozbuild/mozbuild/util.py
@@ -1502,3 +1502,10 @@ def ensure_subprocess_env(env, encoding='utf-8'):
     """
     ensure = ensure_bytes if sys.version_info[0] < 3 else ensure_unicode
     return {ensure(k, encoding): ensure(v, encoding) for k, v in six.iteritems(env)}
+
+
+def process_time():
+    if six.PY2:
+        return time.clock()
+    else:
+        return time.process_time()