diff --git a/libraries/chain/hardfork.d/GPOS.hf b/libraries/chain/hardfork.d/GPOS.hf
index 1cf9c75c..58ff85bf 100644
--- a/libraries/chain/hardfork.d/GPOS.hf
+++ b/libraries/chain/hardfork.d/GPOS.hf
@@ -1,4 +1,5 @@
 // GPOS HARDFORK Monday, 17 February 2020 22:00:00 GMT
+// The value should be harmonized with the protcol constant named GPOS_PERIOD_START
 #ifndef HARDFORK_GPOS_TIME
 #define HARDFORK_GPOS_TIME (fc::time_point_sec( 1581976800 ))
 #endif
diff --git a/libraries/protocol/include/graphene/protocol/config.hpp b/libraries/protocol/include/graphene/protocol/config.hpp
index c855b339..b230e216 100644
--- a/libraries/protocol/include/graphene/protocol/config.hpp
+++ b/libraries/protocol/include/graphene/protocol/config.hpp
@@ -222,7 +222,8 @@
 #define SWEEPS_DEFAULT_DISTRIBUTION_ASSET                   (graphene::protocol::asset_id_type(0))
 #define SWEEPS_VESTING_BALANCE_MULTIPLIER                   100000000
 #define SWEEPS_ACCUMULATOR_ACCOUNT                          (graphene::protocol::account_id_type(0))
-#define GPOS_PERIOD_START                                   (fc::time_point_sec(1578272400))
+// // The value should be harmonized with the chain constant named HARDFORK_GPOS_TIME
+#define GPOS_PERIOD_START                                   (fc::time_point_sec(1581976800))
 #define GPOS_PERIOD                                         (60*60*24*30*6) // 6 months
 #define GPOS_SUBPERIOD                                      (60*60*24*30) // 1 month
 #define GPOS_VESTING_LOCKIN_PERIOD                          (60*60*24*30) // 1 month