diff --git a/apps/calculation/calculation.cpp b/apps/calculation/calculation.cpp
index 84ba7eceb..25ea892c0 100644
--- a/apps/calculation/calculation.cpp
+++ b/apps/calculation/calculation.cpp
@@ -119,16 +119,18 @@ Calculation::DisplayOutput Calculation::displayOutput(Context * context) {
     m_displayOutput = DisplayOutput::ExactOnly;
   } else if (input().recursivelyMatches(
         [](const Expression e, Context * c) {
+          constexpr int approximateOnlyTypesCount = 5;
           /* If the input contains the following types, we only display the
            * approximate output. */
-          ExpressionNode::Type t = e.type();
-          return (t == ExpressionNode::Type::Random)
-            || (t == ExpressionNode::Type::Round)
-            || (t == ExpressionNode::Type::FracPart)
-            || (t == ExpressionNode::Type::ConfidenceInterval)
-            || (t == ExpressionNode::Type::PredictionInterval);
-        },
-        context, true))
+          ExpressionNode::Type approximateOnlyTypes[approximateOnlyTypesCount] = {
+            ExpressionNode::Type::Random,
+            ExpressionNode::Type::Round,
+            ExpressionNode::Type::FracPart,
+            ExpressionNode::Type::ConfidenceInterval,
+            ExpressionNode::Type::PredictionInterval
+          };
+          return e.isOfType(approximateOnlyTypes, approximateOnlyTypesCount);
+        }, context, true))
   {
     m_displayOutput = DisplayOutput::ApproximateOnly;
   } else if (strcmp(exactOutputText(), approximateOutputText()) == 0) {