diff --git a/apps/calculation/expression_field.cpp b/apps/calculation/expression_field.cpp
index b96c4b1fe..587f4b1ed 100644
--- a/apps/calculation/expression_field.cpp
+++ b/apps/calculation/expression_field.cpp
@@ -1,6 +1,9 @@
 #include "expression_field.h"
 #include <poincare/symbol.h>
+#include <poincare/horizontal_layout.h>
+#include <poincare/code_point_layout.h>
 
+using namespace Poincare;
 namespace Calculation {
 
 bool ExpressionField::handleEvent(Ion::Events::Event event) {
@@ -21,7 +24,31 @@ bool ExpressionField::handleEvent(Ion::Events::Event event) {
        event == Ion::Events::EE)) {
     handleEventWithText(Poincare::Symbol::k_ans);
   }
-  return(::ExpressionField::handleEvent(event));
+  if (event == Ion::Events::Minus
+      && isEditing()
+      && fieldHasOnlyAMinus()) {
+    setText(Poincare::Symbol::k_ans);
+  }
+  return (::ExpressionField::handleEvent(event));
+}
+
+bool ExpressionField::fieldHasOnlyAMinus() const {
+  if (editionIsInTextField()) {
+        const char *inputBuffer = m_textField.draftTextBuffer();
+        return (inputBuffer[0] == '-' && inputBuffer[1] == '\0');
+    } 
+  
+    Layout layout = m_layoutField.layout();
+    if (layout.type() == LayoutNode::Type::HorizontalLayout && layout.numberOfChildren() == 1) {
+        Layout child = layout.childAtIndex(0);
+        if (child.type() == LayoutNode::Type::CodePointLayout) {
+            CodePointLayout &codePointLayout = static_cast<CodePointLayout &>(child);
+            if (codePointLayout.codePoint() == '-'){
+            return true;
+            }
+        }
+    }
+    return false;
 }
 
 }