diff --git a/mercurial/patch.py b/mercurial/patch.py
--- a/mercurial/patch.py
+++ b/mercurial/patch.py
@@ -2806,9 +2806,9 @@ def diffstatdata(lines):
               line.startswith('Binary file')):
             isbinary = True
         elif line.startswith('rename from'):
-            filename = line.split()[-1]
+            filename = line[12:]
         elif line.startswith('rename to'):
-            filename += ' => %s' % line.split()[-1]
+            filename += ' => %s' % line[10:]
     addresult()
     return results
 
diff --git a/tests/test-diffstat.t b/tests/test-diffstat.t
--- a/tests/test-diffstat.t
+++ b/tests/test-diffstat.t
@@ -255,3 +255,19 @@ When a file is renamed, --git shouldn't 
   $ hg diff --stat --git
    a => b |  0 
    1 files changed, 0 insertions(+), 0 deletions(-)
+-- filename may contain whitespaces
+  $ echo > c
+  $ hg ci -Am 'add c'
+  adding c
+  $ hg mv c 'new c'
+  $ hg diff --git
+  diff --git a/c b/new c
+  rename from c
+  rename to new c
+  $ hg diff --stat
+   c     |  1 -
+   new c |  1 +
+   2 files changed, 1 insertions(+), 1 deletions(-)
+  $ hg diff --stat --git
+   c => new c |  0 
+   1 files changed, 0 insertions(+), 0 deletions(-)