diff --git a/smem b/smem
index 9c3cb23..d121d5d 100755
--- a/smem
+++ b/smem
@@ -48,12 +48,12 @@ class procdata(object):
             return '?'
     def piduser(self, pid):
         try:
-            return self._stat('%d/cmdline' % pid).st_uid
+            return self._stat('%d/task' % pid).st_uid
         except:
             return -1
     def pidgroup(self, pid):
         try:
-            return self._stat('%d/cmdline' % pid).st_gid
+            return self._stat('%d/task' % pid).st_gid
         except:
             return -1
     def username(self, uid):
@@ -83,12 +83,12 @@ class tardata(procdata):
     def _readlines(self, f):
         return self.tar.extractfile(f).readlines()
     def piduser(self, p):
-        t = self.tar.getmember("%s/cmdline" % p)
+        t = self.tar.getmember("%s/task" % p)
         if t.uname:
             self._ucache[t.uid] = t.uname
         return t.uid
     def pidgroup(self, p):
-        t = self.tar.getmember("%s/cmdline" % p)
+        t = self.tar.getmember("%s/task" % p)
         if t.gname:
             self._gcache[t.gid] = t.gname
         return t.gid