diff --git a/RELEASE_NOTES b/RELEASE_NOTES
index 7e3525720..f07cb4de1 100644
--- a/RELEASE_NOTES
+++ b/RELEASE_NOTES
@@ -69,6 +69,7 @@ Bugs fixed
 - Bug 1727 - Ping6 should use a proper source address
 - Bug 1731 - lte-phy-error-model passes unexpectedly
 - Bug 1742 - IPv6 HbH and Dst Extension Header size is not correctly calculated
+- Bug 1752 - RadvdInterface m_defaultLifeTime is set to milliseconds instead of seconds
 
 Known issues
 ------------
diff --git a/src/applications/model/radvd-interface.cc b/src/applications/model/radvd-interface.cc
index 0721d9920..b555b036b 100644
--- a/src/applications/model/radvd-interface.cc
+++ b/src/applications/model/radvd-interface.cc
@@ -41,7 +41,7 @@ RadvdInterface::RadvdInterface (uint32_t interface)
   m_reachableTime = 0; /* means unspecified for the router */
   m_retransTimer = 0; /* means unspecified for the router */
   m_curHopLimit = 64;
-  m_defaultLifeTime = 3 * m_maxRtrAdvInterval;
+  m_defaultLifeTime = (3 * m_maxRtrAdvInterval) / 1000;
   m_defaultPreference = 1;
   m_sourceLLAddress = true;
   m_homeAgentFlag = false;