diff --git a/chain/gen/gen.go b/chain/gen/gen.go
index abbc87e93..ebf868765 100644
--- a/chain/gen/gen.go
+++ b/chain/gen/gen.go
@@ -414,7 +414,7 @@ func (cg *ChainGen) makeBlock(parents *types.TipSet, m address.Address, vrfticke
 	if cg.Timestamper != nil {
 		ts = cg.Timestamper(parents, height-parents.Height())
 	} else {
-		ts = parents.MinTimestamp() + uint64(height-parents.Height())*uint64(build.BlockDelaySecs)
+		ts = parents.MinTimestamp() + uint64(height-parents.Height())*build.BlockDelaySecs
 	}
 
 	fblk, err := MinerCreateBlock(context.TODO(), cg.sm, cg.w, &api.BlockTemplate{
diff --git a/node/impl/common/common.go b/node/impl/common/common.go
index 2d1beaa31..1d2695b6e 100644
--- a/node/impl/common/common.go
+++ b/node/impl/common/common.go
@@ -122,7 +122,7 @@ func (a *CommonAPI) Version(context.Context) (api.Version, error) {
 		Version:    build.UserVersion(),
 		APIVersion: build.APIVersion,
 
-		BlockDelay: uint64(build.BlockDelaySecs),
+		BlockDelay: build.BlockDelaySecs,
 	}, nil
 }