diff --git a/src/chainparams.cpp b/src/chainparams.cpp
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -150,6 +150,9 @@
         // Nov 15, 2021 12:00:00 UTC protocol upgrade
         consensus.selectronActivationTime = 1636977600;
 
+        // May 15, 2022 12:00:00 UTC protocol upgrade
+        consensus.gluonActivationTime = 1652616000;
+
         /**
          * The message start string is designed to be unlikely to occur in
          * normal data. The characters are rarely used upper ASCII, not valid as
@@ -310,6 +313,9 @@
         // Nov 15, 2021 12:00:00 UTC protocol upgrade
         consensus.selectronActivationTime = 1636977600;
 
+        // May 15, 2022 12:00:00 UTC protocol upgrade
+        consensus.gluonActivationTime = 1652616000;
+
         diskMagic[0] = 0x0b;
         diskMagic[1] = 0x11;
         diskMagic[2] = 0x09;
@@ -444,6 +450,9 @@
         // Nov 15, 2021 12:00:00 UTC protocol upgrade
         consensus.selectronActivationTime = 1636977600;
 
+        // May 15, 2022 12:00:00 UTC protocol upgrade
+        consensus.gluonActivationTime = 1652616000;
+
         diskMagic[0] = 0xfa;
         diskMagic[1] = 0xbf;
         diskMagic[2] = 0xb5;
diff --git a/src/consensus/params.h b/src/consensus/params.h
--- a/src/consensus/params.h
+++ b/src/consensus/params.h
@@ -86,6 +86,8 @@
     int tachyonActivationTime;
     /** Unix time used for MTP activation of 15 Nov 2021 12:00:00 UTC upgrade */
     int selectronActivationTime;
+    /** Unix time used for MTP activation of 15 May 2022 12:00:00 UTC upgrade */
+    int gluonActivationTime;
 
     /**
      * Don't warn about unknown BIP 9 activations below this height.
diff --git a/src/validation.cpp b/src/validation.cpp
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -275,7 +275,7 @@
 static bool IsReplayProtectionEnabled(const Consensus::Params &params,
                                       int64_t nMedianTimePast) {
     return nMedianTimePast >= gArgs.GetArg("-replayprotectionactivationtime",
-                                           params.selectronActivationTime);
+                                           params.gluonActivationTime);
 }
 
 static bool IsReplayProtectionEnabled(const Consensus::Params &params,