diff --git a/src/input/input.ts b/src/input/input.ts
index 7765f97d6..0bf706f22 100644
--- a/src/input/input.ts
+++ b/src/input/input.ts
@@ -59,12 +59,12 @@ export class TlInput implements ControlValueAccessor {
         }
     }
 
-    registerOnChange(fn: any) {
-        this.onChangeCallback = fn;
+    registerOnChange(callback: any) {
+        this.onChangeCallback = callback;
     }
 
-    registerOnTouched(fn: any) {
-        this.onTouchedCallback = fn;
+    registerOnTouched(callback: any) {
+        this.onTouchedCallback = callback;
     }
 
     clearInput() {