diff --git a/mininet/node.py b/mininet/node.py
index 9e50319..258ce84 100644
--- a/mininet/node.py
+++ b/mininet/node.py
@@ -250,7 +250,7 @@ class Node( object ):
         self.waitReadable( timeoutms )
         data = self.read( 1024 )
         # Look for PID
-        marker = chr( 1 ) + r'\d+'
+        marker = chr( 1 ) + r'\d+\r\n'
         if findPid and chr( 1 ) in data:
             markers = re.findall( marker, data )
             if markers: