diff --git a/mininet/node.py b/mininet/node.py
index 20b18aae1b47ff7ff6c2cfe1572615c64201c7b4..42aa1d9e6f3a52b6be7e41e6e7e3857d0a4559e8 100644
--- a/mininet/node.py
+++ b/mininet/node.py
@@ -661,7 +661,7 @@ def rtInfo( self, f ):
         "Internal method: return parameters for RT bandwidth"
         pstr, qstr = 'rt_period_us', 'rt_runtime_us'
         # RT uses wall clock time for period and quota
-        quota = int( self.period_us * f * numCores() )
+        quota = int( self.period_us * f )
         return pstr, qstr, self.period_us, quota
 
     def cfsInfo( self, f):