diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 6b82e3244..3a2f981a5 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,8 @@
+2015-08-17  Corinna Vinschen  <corinna@vinschen.de>
+
+	* fhandler_proc.cc (format_proc_cpuinfo): Print cpb and eff_freq_ro
+	power management flags.
+
 2015-08-15  Corinna Vinschen  <corinna@vinschen.de>
 
 	* fhandler.cc (fhandler_base_overlapped::raw_write): When performing
diff --git a/winsup/cygwin/fhandler_proc.cc b/winsup/cygwin/fhandler_proc.cc
index 13311b883..55e13cd76 100644
--- a/winsup/cygwin/fhandler_proc.cc
+++ b/winsup/cygwin/fhandler_proc.cc
@@ -1256,6 +1256,10 @@ format_proc_cpuinfo (void *, char *&destbuf)
 	    print (" 100mhzsteps");
 	  if (features1 & (1 << 7))
 	    print (" hwpstate");
+	  if (features1 & (1 << 9))
+	    print (" cpb");
+	  if (features1 & (1 << 10))
+	    print (" eff_freq_ro");
 	}
 
       if (orig_affinity_mask != 0)