diff --git a/src/consensus/validation.h b/src/consensus/validation.h
--- a/src/consensus/validation.h
+++ b/src/consensus/validation.h
@@ -14,7 +14,6 @@
 static const uint8_t REJECT_OBSOLETE = 0x11;
 static const uint8_t REJECT_DUPLICATE = 0x12;
 static const uint8_t REJECT_NONSTANDARD = 0x40;
-static const uint8_t REJECT_DUST = 0x41;
 static const uint8_t REJECT_INSUFFICIENTFEE = 0x42;
 static const uint8_t REJECT_CHECKPOINT = 0x43;
 
diff --git a/src/version.h b/src/version.h
--- a/src/version.h
+++ b/src/version.h
@@ -26,9 +26,6 @@
 //! BIP 0031, pong message, is enabled for all versions AFTER this one
 static const int BIP0031_VERSION = 60000;
 
-//! "mempool" command, enhanced "getdata" behavior starts with this version
-static const int MEMPOOL_GD_VERSION = 60002;
-
 //! "filter*" commands are disabled without NODE_BLOOM after and including this
 //! version
 static const int NO_BLOOM_VERSION = 70011;