diff --git a/escher/include/escher/expression_field.h b/escher/include/escher/expression_field.h
index 8b1310fbb..1c2c701aa 100644
--- a/escher/include/escher/expression_field.h
+++ b/escher/include/escher/expression_field.h
@@ -40,11 +40,11 @@ public:
 private:
   static constexpr int k_textFieldBufferSize = TextField::maxBufferSize();
   static constexpr KDCoordinate k_minimalHeight = 37;
+  static constexpr KDCoordinate k_maximalHeight = 0.6*Ion::Display::Height;
   static constexpr KDCoordinate k_horizontalMargin = 5;
   static constexpr KDCoordinate k_verticalMargin = 5;
   constexpr static KDCoordinate k_separatorThickness = Metric::CellSeparatorThickness;
   KDCoordinate inputViewHeight() const;
-  KDCoordinate maximalHeight() const;
   TextField m_textField;
   LayoutField m_layoutField;
 };
diff --git a/escher/src/expression_field.cpp b/escher/src/expression_field.cpp
index 7d274ed8f..268d20507 100644
--- a/escher/src/expression_field.cpp
+++ b/escher/src/expression_field.cpp
@@ -100,7 +100,7 @@ bool ExpressionField::isEmpty() const {
 }
 
 bool ExpressionField::heightIsMaximal() const {
-  return inputViewHeight() == k_separatorThickness + maximalHeight();
+  return inputViewHeight() == k_separatorThickness + k_maximalHeight;
 }
 
 bool ExpressionField::handleEventWithText(const char * text, bool indentation, bool forceCursorRightOfText) {
@@ -114,10 +114,6 @@ bool ExpressionField::handleEventWithText(const char * text, bool indentation, b
 KDCoordinate ExpressionField::inputViewHeight() const {
   return k_separatorThickness
     + (editionIsInTextField() ? k_minimalHeight :
-        minCoordinate(maximalHeight(),
+        minCoordinate(k_maximalHeight,
           maxCoordinate(k_minimalHeight, m_layoutField.minimalSizeForOptimalDisplay().height())));
 }
-
-KDCoordinate ExpressionField::maximalHeight() const {
-  return 0.6*Ion::Display::Height;
-}