diff --git a/substrate/frame/staking/src/lib.rs b/substrate/frame/staking/src/lib.rs
index 29aeb7901c..ae9e53c851 100644
--- a/substrate/frame/staking/src/lib.rs
+++ b/substrate/frame/staking/src/lib.rs
@@ -445,7 +445,7 @@ type PositiveImbalanceOf<T> =
 	<<T as Trait>::Currency as Currency<<T as system::Trait>::AccountId>>::PositiveImbalance;
 type NegativeImbalanceOf<T> =
 	<<T as Trait>::Currency as Currency<<T as system::Trait>::AccountId>>::NegativeImbalance;
-type MomentOf<T>= <<T as Trait>::Time as Time>::Moment;
+type MomentOf<T> = <<T as Trait>::Time as Time>::Moment;
 
 /// Means for interacting with a specialized version of the `session` trait.
 ///