diff --git a/CHANGELOG_PENDING.md b/CHANGELOG_PENDING.md
index fd340d4da..b499ab40c 100644
--- a/CHANGELOG_PENDING.md
+++ b/CHANGELOG_PENDING.md
@@ -25,4 +25,6 @@ program](https://hackerone.com/tendermint).
 
 ### IMPROVEMENTS:
 
+- [config] \#2877 add blocktime_iota to the config.toml (@ackratos)
+
 ### BUG FIXES:
diff --git a/config/toml.go b/config/toml.go
index 6f0578e44..21e017b45 100644
--- a/config/toml.go
+++ b/config/toml.go
@@ -260,6 +260,9 @@ create_empty_blocks_interval = "{{ .Consensus.CreateEmptyBlocksInterval }}"
 peer_gossip_sleep_duration = "{{ .Consensus.PeerGossipSleepDuration }}"
 peer_query_maj23_sleep_duration = "{{ .Consensus.PeerQueryMaj23SleepDuration }}"
 
+# Block time parameters. Corresponds to the minimum time increment between consecutive blocks.
+blocktime_iota = "{{ .Consensus.BlockTimeIota }}"
+
 ##### transactions indexer configuration options #####
 [tx_index]
 
diff --git a/docs/tendermint-core/configuration.md b/docs/tendermint-core/configuration.md
index 13894a308..7d1a562ec 100644
--- a/docs/tendermint-core/configuration.md
+++ b/docs/tendermint-core/configuration.md
@@ -203,6 +203,9 @@ create_empty_blocks_interval = "0s"
 peer_gossip_sleep_duration = "100ms"
 peer_query_maj23_sleep_duration = "2000ms"
 
+# Block time parameters. Corresponds to the minimum time increment between consecutive blocks.
+blocktime_iota = "1000ms"
+
 ##### transactions indexer configuration options #####
 [tx_index]