1 files changed, 5 insertions, 0 deletions
diff --git a/src/consensus/params.h b/src/consensus/params.h
index 0983595c6a..5d566a01b9 100644
--- a/src/consensus/params.h
+++ b/src/consensus/params.h
@@ -29,6 +29,11 @@ struct BIP9Deployment {
     int64_t nStartTime;
     /** Timeout/expiry MedianTime for the deployment attempt. */
     int64_t nTimeout;
+    /** If lock in occurs, delay activation until at least this block
+     *  height.  Note that activation will only occur on a retarget
+     *  boundary.
+     */
+    int min_activation_height{0};
 
     /** Constant for nTimeout very far in the future. */
     static constexpr int64_t NO_TIMEOUT = std::numeric_limits<int64_t>::max();