diff --git a/CommonSubexpressionEliminator.cpp b/CommonSubexpressionEliminator.cpp
index fe86908fb..fadf2776a 100644
--- a/CommonSubexpressionEliminator.cpp
+++ b/CommonSubexpressionEliminator.cpp
@@ -437,7 +437,7 @@ void CSECodeGenerator::appendDup(int _fromPosition, SourceLocation const& _locat
 {
 	assertThrow(_fromPosition != c_invalidPosition, OptimizerException, "");
 	int instructionNum = 1 + m_stackHeight - _fromPosition;
-	assertThrow(instructionNum <= 16, StackTooDeepException, "Stack too deep.");
+	assertThrow(instructionNum <= 16, StackTooDeepException, "Stack too deep, try removing local variables.");
 	assertThrow(1 <= instructionNum, OptimizerException, "Invalid stack access.");
 	appendItem(AssemblyItem(dupInstruction(instructionNum), _location));
 	m_stack[m_stackHeight] = m_stack[_fromPosition];
@@ -450,7 +450,7 @@ void CSECodeGenerator::appendOrRemoveSwap(int _fromPosition, SourceLocation cons
 	if (_fromPosition == m_stackHeight)
 		return;
 	int instructionNum = m_stackHeight - _fromPosition;
-	assertThrow(instructionNum <= 16, StackTooDeepException, "Stack too deep.");
+	assertThrow(instructionNum <= 16, StackTooDeepException, "Stack too deep, try removing local variables.");
 	assertThrow(1 <= instructionNum, OptimizerException, "Invalid stack access.");
 	appendItem(AssemblyItem(swapInstruction(instructionNum), _location));