diff --git a/src/prelude/string.ts b/src/prelude/string.ts
index 8855adb90..cae776bc3 100644
--- a/src/prelude/string.ts
+++ b/src/prelude/string.ts
@@ -1,7 +1,11 @@
 export function capitalize(s: string): string {
-	return toUpperCase(s.charAt(0)) + s.slice(1).toLowerCase();
+	return toUpperCase(s.charAt(0)) + toLowerCase(s.slice(1));
 }
 
 export function toUpperCase(s: string): string {
 	return s.toUpperCase();
 }
+
+export function toLowerCase(s: string): string {
+	return s.toLowerCase();
+}