diff --git a/feature/calculator/src/main/java/com/sadellie/unitto/feature/calculator/RPNCalculatorViewModel.kt b/feature/calculator/src/main/java/com/sadellie/unitto/feature/calculator/RPNCalculatorViewModel.kt
index ec9b6269..1a20c7ae 100644
--- a/feature/calculator/src/main/java/com/sadellie/unitto/feature/calculator/RPNCalculatorViewModel.kt
+++ b/feature/calculator/src/main/java/com/sadellie/unitto/feature/calculator/RPNCalculatorViewModel.kt
@@ -85,6 +85,7 @@ internal class RPNCalculatorViewModel @Inject constructor(
             RPNInputEdit.Delete -> input.deleteTokens()
         }
 
+        _input.update { newInput }
         savedStateHandle[_inputKey] = newInput.text
     }