diff --git a/src/CalcViewModel/StandardCalculatorViewModel.cpp b/src/CalcViewModel/StandardCalculatorViewModel.cpp
index a25aeb18..737c7a06 100644
--- a/src/CalcViewModel/StandardCalculatorViewModel.cpp
+++ b/src/CalcViewModel/StandardCalculatorViewModel.cpp
@@ -525,6 +525,7 @@ void StandardCalculatorViewModel::HandleUpdatedOperandData(Command cmdenum)
             length = m_selectedExpressionLastData->Length() + 1;
             if (length > 50)
             {
+                delete [] temp;
                 return;
             }
             for (; i < length; ++i)