diff --git a/src/common/lookups/AffiliationLookup.cpp b/src/common/lookups/AffiliationLookup.cpp
index 262b96b5..e061008b 100644
--- a/src/common/lookups/AffiliationLookup.cpp
+++ b/src/common/lookups/AffiliationLookup.cpp
@@ -79,7 +79,8 @@ void AffiliationLookup::unitReg(uint32_t srcId)
 }
 
 /* Helper to group unaffiliate a source ID. */
-bool AffiliationLookup::unitDereg(uint32_t srcId)
+
+bool AffiliationLookup::unitDereg(uint32_t srcId, bool automatic)
 {
     bool ret = false;
 
@@ -105,7 +106,7 @@ bool AffiliationLookup::unitDereg(uint32_t srcId)
 
     if (ret) {
         if (m_unitDereg != nullptr) {
-            m_unitDereg(srcId);
+            m_unitDereg(srcId, automatic);
         }
     }
 
@@ -541,7 +542,7 @@ void AffiliationLookup::clock(uint32_t ms)
 
         // release units registrations that have timed out
         for (uint32_t srcId : unitsToDereg) {
-            unitDereg(srcId);
+            unitDereg(srcId, true);
         }
     }
 }
diff --git a/src/common/lookups/AffiliationLookup.h b/src/common/lookups/AffiliationLookup.h
index 4ab3e10d..1de12a3b 100644
--- a/src/common/lookups/AffiliationLookup.h
+++ b/src/common/lookups/AffiliationLookup.h
@@ -74,9 +74,10 @@ namespace lookups
         /**
          * @brief Helper to deregister a source ID.
          * @param srcId Source Radio ID.
+         * @param automatic Flag indicating the deregistration is a result of an automated timer.
          * @returns bool True, if source ID is deregistered, otherwise false.
          */
-        virtual bool unitDereg(uint32_t srcId);
+        virtual bool unitDereg(uint32_t srcId, bool automatic = false);
         /**
          * @brief Helper to start the source ID registration timer.
          * @param srcId Source Radio ID.
@@ -265,7 +266,7 @@ namespace lookups
          * @brief Helper to set the unit deregistration callback.
          * @param callback Unit deregistration function callback.
          */
-        void setUnitDeregCallback(std::function<void(uint32_t)>&& callback) { m_unitDereg = callback; }
+        void setUnitDeregCallback(std::function<void(uint32_t, bool)>&& callback) { m_unitDereg = callback; }
 
     protected:
         uint8_t m_rfGrantChCnt;
@@ -282,8 +283,8 @@ namespace lookups
 
         //                 chNo      dstId     slot
         std::function<void(uint32_t, uint32_t, uint8_t)> m_releaseGrant;
-        //                 srcId
-        std::function<void(uint32_t)> m_unitDereg;
+        //                 srcId     auto
+        std::function<void(uint32_t, bool)> m_unitDereg;
 
         std::string m_name;
         ChannelLookup* m_chLookup;
diff --git a/src/host/dmr/Slot.cpp b/src/host/dmr/Slot.cpp
index 8f55ccd2..5819c9c3 100644
--- a/src/host/dmr/Slot.cpp
+++ b/src/host/dmr/Slot.cpp
@@ -924,7 +924,7 @@ void Slot::init(Control* dmr, bool authoritative, uint32_t colorCode, SiteData s
     });
 
     // set the unit deregistration callback
-    m_affiliations->setUnitDeregCallback([=](uint32_t srcId) {
+    m_affiliations->setUnitDeregCallback([=](uint32_t srcId, bool automatic) {
         if (m_network != nullptr)
             m_network->announceUnitDeregistration(srcId);
     });
diff --git a/src/host/nxdn/Control.cpp b/src/host/nxdn/Control.cpp
index 9cd40ceb..50fca213 100644
--- a/src/host/nxdn/Control.cpp
+++ b/src/host/nxdn/Control.cpp
@@ -272,7 +272,7 @@ void Control::setOptions(yaml::Node& conf, bool supervisor, const std::string cw
     });
 
     // set the unit deregistration callback
-    m_affiliations.setUnitDeregCallback([=](uint32_t srcId) {
+    m_affiliations.setUnitDeregCallback([=](uint32_t srcId, bool automatic) {
         if (m_network != nullptr)
             m_network->announceUnitDeregistration(srcId);
     });
diff --git a/src/host/p25/Control.cpp b/src/host/p25/Control.cpp
index eba8ff34..61a73743 100644
--- a/src/host/p25/Control.cpp
+++ b/src/host/p25/Control.cpp
@@ -404,12 +404,12 @@ void Control::setOptions(yaml::Node& conf, bool supervisor, const std::string cw
     });
 
     // set the unit deregistration callback
-    m_affiliations.setUnitDeregCallback([=](uint32_t srcId) {
+    m_affiliations.setUnitDeregCallback([=](uint32_t srcId, bool automatic) {
         if (m_network != nullptr)
             m_network->announceUnitDeregistration(srcId);
 
         // fire off a U_REG_CMD to get the SU to re-affiliate
-        if (m_enableControl) {
+        if (m_enableControl && automatic) {
             m_control->writeRF_TSDU_U_Reg_Cmd(srcId);
         }
     });