diff --git a/script.js b/script.js
index 4c8aa9d..53ad0b9 100644
--- a/script.js
+++ b/script.js
@@ -21,7 +21,11 @@ class Calculator {
   }
 
   chooseOperation(operation) {
-    if (this.currentOperand === '') return
+    if (this.currentOperand === '' || this.currentOperand === '-') {
+      if (this.currentOperand === '-' && operation === '-') return; // Prevent adding multiple '-' signs
+      this.currentOperand += operation; // Append the '-' sign to the current operand
+      return;
+    }
     if (this.previousOperand !== '') {
       this.compute()
     }
@@ -123,4 +127,4 @@ allClearButton.addEventListener('click', button => {
 deleteButton.addEventListener('click', button => {
   calculator.delete()
   calculator.updateDisplay()
-})
\ No newline at end of file
+})