diff --git a/src/parse/utils/hash.ts b/src/parse/utils/hash.ts
index 4c6f9f14fe..8bc550a5c0 100644
--- a/src/parse/utils/hash.ts
+++ b/src/parse/utils/hash.ts
@@ -3,6 +3,6 @@ export default function hash(str: string): number {
 	let hash = 5381;
 	let i = str.length;
 
-	while (i--) hash = ((hash << 5) + hash) ^ str.charCodeAt(i);
+	while (i--) hash = ((hash << 5) - hash) ^ str.charCodeAt(i);
 	return hash >>> 0;
 }
diff --git a/src/shared/transitions.js b/src/shared/transitions.js
index df788bd888..4f3efb66de 100644
--- a/src/shared/transitions.js
+++ b/src/shared/transitions.js
@@ -27,7 +27,7 @@ export function hash(str) {
 	var hash = 5381;
 	var i = str.length;
 
-	while (i--) hash = ((hash << 5) + hash) ^ str.charCodeAt(i);
+	while (i--) hash = ((hash << 5) - hash) ^ str.charCodeAt(i);
 	return hash >>> 0;
 }