diff --git a/RELEASE_NOTES b/RELEASE_NOTES
index e2868f257..1f3c2e3c7 100644
--- a/RELEASE_NOTES
+++ b/RELEASE_NOTES
@@ -29,6 +29,7 @@ Bugs fixed
 - Bug 1722 - beacons transmitted concurrently
 - Bug 1616 - WifiPhyStateHelper reports false CCA_BUSY times at State trace source
 - Bug 1011 - assert failed. file=../src/devices/wifi/dcf-manager.cc
+- Bug 1691 - RTS/CTS NAV reset prematurely
 
 Release 3.18
 =============
diff --git a/src/wifi/model/mac-low.cc b/src/wifi/model/mac-low.cc
index 4825071c0..04b412298 100644
--- a/src/wifi/model/mac-low.cc
+++ b/src/wifi/model/mac-low.cc
@@ -1159,7 +1159,7 @@ MacLow::NotifyNav (Ptr<const Packet> packet,const WifiMacHeader &hdr, WifiMode t
 void
 MacLow::NavCounterResetCtsMissed (Time rtsEndRxTime)
 {
-  if (m_phy->GetLastRxStartTime () > rtsEndRxTime)
+  if (m_phy->GetLastRxStartTime () < rtsEndRxTime)
     {
       DoNavResetNow (Seconds (0.0));
     }