diff --git a/src/proto_alpha/lib_protocol/src/alpha_context.mli b/src/proto_alpha/lib_protocol/src/alpha_context.mli
index d10411fb7..774b43c0d 100644
--- a/src/proto_alpha/lib_protocol/src/alpha_context.mli
+++ b/src/proto_alpha/lib_protocol/src/alpha_context.mli
@@ -260,7 +260,7 @@ module Constants : sig
   val nonce_length: int
   val seed_nonce_revelation_tip: Tez.t
   val origination_burn: Tez.t
-  val baking_bond_cost: Tez.t
+  val block_security_deposit: Tez.t
   val endorsement_bond_cost: Tez.t
   val faucet_credit: Tez.t
 
diff --git a/src/proto_alpha/lib_protocol/src/baking.ml b/src/proto_alpha/lib_protocol/src/baking.ml
index 6a0669ffc..f7c283938 100644
--- a/src/proto_alpha/lib_protocol/src/baking.ml
+++ b/src/proto_alpha/lib_protocol/src/baking.ml
@@ -134,7 +134,7 @@ let freeze_baking_bond ctxt { Block_header.priority ; _ } delegate =
   if Compare.Int.(priority >= Constants.first_free_baking_slot ctxt)
   then return (ctxt, Tez.zero)
   else
-    let bond = Constants.baking_bond_cost in
+    let bond = Constants.block_security_deposit in
     Delegate.freeze_bond ctxt delegate bond
     |> trace Cannot_freeze_baking_bond >>=? fun ctxt ->
     return (ctxt, bond)
diff --git a/src/proto_alpha/lib_protocol/src/baking.mli b/src/proto_alpha/lib_protocol/src/baking.mli
index 251b22d5a..5b6e8af97 100644
--- a/src/proto_alpha/lib_protocol/src/baking.mli
+++ b/src/proto_alpha/lib_protocol/src/baking.mli
@@ -29,7 +29,7 @@ val paying_priorities: context -> int list
 val minimal_time: context -> int -> Time.t -> Time.t tzresult Lwt.t
 
 (** [freeze_baking_bond: ctxt delegate priority]
-    Freeze the baking bond (See !Constants.baking_bond_cost)
+    Freeze the baking bond (See !Constants.block_security_deposit)
     from a delegate account. No bond is frozen if the baking
     priority of this block is greater than the maximum number
     of paying baking in the network (meaning that n. bakers
diff --git a/src/proto_alpha/lib_protocol/src/constants_repr.ml b/src/proto_alpha/lib_protocol/src/constants_repr.ml
index c7283f242..a5126cb3d 100644
--- a/src/proto_alpha/lib_protocol/src/constants_repr.ml
+++ b/src/proto_alpha/lib_protocol/src/constants_repr.ml
@@ -21,7 +21,7 @@ let origination_burn =
   Tez_repr.one
 
 (* 512 tez *)
-let baking_bond_cost =
+let block_security_deposit =
   Tez_repr.(mul_exn one 512)
 
 (* 64 tez *)
diff --git a/src/proto_alpha/lib_protocol/test/test_endorsement.ml b/src/proto_alpha/lib_protocol/test/test_endorsement.ml
index abdf7376f..d701bc007 100644
--- a/src/proto_alpha/lib_protocol/test/test_endorsement.ml
+++ b/src/proto_alpha/lib_protocol/test/test_endorsement.ml
@@ -72,11 +72,11 @@ let test_endorsement_payment () =
     let endorsement_bond_cost =
       Constants.endorsement_bond_cost in
     let baking = baker_hpub = contract_p.hpub && block_priority < 4 in
-    let baking_bond_cost =
+    let block_security_deposit =
       if baking
-      then Constants.baking_bond_cost
+      then Constants.block_security_deposit
       else Tez.zero in
-    let cost = Cast.tez_add endorsement_bond_cost baking_bond_cost in
+    let cost = Cast.tez_add endorsement_bond_cost block_security_deposit in
     let expected_balance = Cast.tez_sub init_balance cost in
     Assert.equal_tez ~msg: __LOC__ expected_balance bond_balance ;
     (* After one cycle, (4 blocks in test/proto_alpha/sandbox),