diff --git a/proto/tendermint/types/params.proto b/proto/tendermint/types/params.proto
index 466ba464f..806009d92 100644
--- a/proto/tendermint/types/params.proto
+++ b/proto/tendermint/types/params.proto
@@ -17,6 +17,7 @@ message ConsensusParams {
   VersionParams   version   = 4;
   SynchronyParams synchrony = 5;
   TimeoutParams   timeout   = 6;
+  ABCIParams      abci      = 7;
 }
 
 // BlockParams contains limits on the block size.
@@ -127,3 +128,13 @@ message TimeoutParams {
   // for the full commit timeout.
   bool bypass_commit_timeout = 6;
 }
+
+// ABCIParams configure functionality specific to the Application Blockchain Interface.
+message ABCIParams {
+  // vote_extensions_enable_height configures the first height during which
+  // vote extensions will be enabled. During this specified height, and for all
+  // subsequent heights, precommit messages that do not contain valid extension data
+  // will be considered invalid. Prior to this height, vote extensions will not
+  // be used or accepted by validators on the network.
+  int64 vote_extensions_enable_height = 1;
+}