diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 5fa37fb3d..ba0b9a21c 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,8 @@
+2012-08-23  Christopher Faylor  <me.cygwin2012@cgf.cx>
+
+	* pinfo.cc (_pinfo::exists): Don't consider a process with no state to
+	exist.
+
 2012-08-21  Christopher Faylor  <me.cygwin2012@cgf.cx>
 
 	* net.cc (get_adapters_addresses): Drop FIXME part of comment.
diff --git a/winsup/cygwin/pinfo.cc b/winsup/cygwin/pinfo.cc
index 6d8e41356..8ac58d097 100644
--- a/winsup/cygwin/pinfo.cc
+++ b/winsup/cygwin/pinfo.cc
@@ -488,7 +488,7 @@ _pinfo::set_ctty (fhandler_termios *fh, int flags)
 bool __stdcall
 _pinfo::exists ()
 {
-  return this && !(process_state & (PID_EXITED | PID_REAPED | PID_EXECED));
+  return this && process_state && !(process_state & (PID_EXITED | PID_REAPED | PID_EXECED));
 }
 
 bool