diff --git a/app/src/main/kotlin/com/simplemobiletools/calculator/activities/MainActivity.kt b/app/src/main/kotlin/com/simplemobiletools/calculator/activities/MainActivity.kt
index 3dde21c4..c363d6e4 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calculator/activities/MainActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calculator/activities/MainActivity.kt
@@ -43,7 +43,7 @@ class MainActivity : SimpleActivity(), Calculator {
         btn_root.setOnClickListener { calc.handleOperation(ROOT); checkHaptic(it) }
 
         btn_minus.setOnLongClickListener {
-            calc.turnToNegative();
+            calc.turnToNegative()
         }
 
         btn_clear.setOnClickListener { calc.handleClear(); checkHaptic(it) }
diff --git a/app/src/main/kotlin/com/simplemobiletools/calculator/helpers/CalculatorImpl.kt b/app/src/main/kotlin/com/simplemobiletools/calculator/helpers/CalculatorImpl.kt
index aa972a59..fe0f4952 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calculator/helpers/CalculatorImpl.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calculator/helpers/CalculatorImpl.kt
@@ -123,18 +123,19 @@ class CalculatorImpl(calculator: Calculator, private val context: Context) {
         showNewResult(inputDisplayedFormula)
     }
 
-    fun turnToNegative() : Boolean{
+    fun turnToNegative(): Boolean {
         // turn to negative only if there is a baseValue alone ( not 0 )
-        if (!inputDisplayedFormula.trimStart('-').any { it.toString() in operations } && inputDisplayedFormula.replace(",", "").toDouble() != 0.0){
-
-            if(inputDisplayedFormula.first() == '-') {
+        if (!inputDisplayedFormula.trimStart('-').any { it.toString() in operations } && inputDisplayedFormula.replace(",", "").toDouble() != 0.0) {
+            if (inputDisplayedFormula.first() == '-') {
                 inputDisplayedFormula = inputDisplayedFormula.substring(1)
-            }else{
+            } else {
                 inputDisplayedFormula = "-$inputDisplayedFormula"
             }
+
             showNewResult(inputDisplayedFormula)
             return true
         }
+
         return false
     }