diff --git a/frame/bridge/relay-authorities/src/lib.rs b/frame/bridge/relay-authorities/src/lib.rs
index 96dfe4323c..6259a74ba1 100644
--- a/frame/bridge/relay-authorities/src/lib.rs
+++ b/frame/bridge/relay-authorities/src/lib.rs
@@ -516,9 +516,10 @@ decl_module! {
 
 			signatures.push((old_authority, signature));
 
-			if Perbill::from_rational_approximation(signatures.len() as u32 + 1, old_authorities.len() as _)
+			if Perbill::from_rational_approximation(signatures.len() as u32, old_authorities.len() as _)
 				>= T::SignThreshold::get()
 			{
+				Self::wait_target_chain_authorities_change();
 				Self::deposit_event(RawEvent::AuthoritiesSetSigned(
 					<AuthorityTerm<I>>::get(),
 					<Authorities<T, I>>::get()
@@ -527,7 +528,6 @@ decl_module! {
 						.collect(),
 					signatures
 				));
-				Self::wait_target_chain_authorities_change();
 			} else {
 				<AuthoritiesToSign<T, I>>::put((message, signatures));
 			}
diff --git a/frame/bridge/relay-authorities/src/test.rs b/frame/bridge/relay-authorities/src/test.rs
index 4d3356e3f1..b9b7e73b8b 100644
--- a/frame/bridge/relay-authorities/src/test.rs
+++ b/frame/bridge/relay-authorities/src/test.rs
@@ -270,5 +270,33 @@ fn authorities_set_signed_event_should_work() {
 				vec![(9, [0; 65])]
 			))]
 		);
+
+		RelayAuthorities::finish_authorities_change();
+
+		assert_ok!(request_authority(2));
+		assert_ok!(RelayAuthorities::add_authority(Origin::root(), 2));
+
+		events();
+
+		assert_ok!(RelayAuthorities::submit_signed_authorities(
+			Origin::signed(9),
+			[0; 65]
+		));
+		// Not enough signatures, `1 / 2 < 60%`
+		assert!(relay_authorities_events().is_empty());
+		assert_ok!(RelayAuthorities::submit_signed_authorities(
+			Origin::signed(1),
+			[0; 65]
+		));
+
+		// Enough signatures, `2 / 2 > 60%`
+		assert_eq!(
+			relay_authorities_events(),
+			vec![Event::relay_authorities(RawEvent::AuthoritiesSetSigned(
+				1,
+				vec![Default::default(), Default::default(), Default::default()],
+				vec![(9, [0; 65]), (1, [0; 65])]
+			))]
+		);
 	});
 }