diff --git a/core/src/commands/fast_forward.rs b/core/src/commands/fast_forward.rs
index 27132ff65a..fc3e1f5294 100644
--- a/core/src/commands/fast_forward.rs
+++ b/core/src/commands/fast_forward.rs
@@ -41,7 +41,7 @@ pub struct Command {
     pub n_blocks: u64,
 
     /// The chain blocktime in milliseconds.
-    #[arg(long, default_value = "6000")]
+    #[arg(long)]
     pub blocktime: u64,
 
     /// Which try-state targets to execute when running this command.