diff --git a/libsolidity/codegen/ir/IRGeneratorForStatements.cpp b/libsolidity/codegen/ir/IRGeneratorForStatements.cpp
index 53c0586ea..6bc4538f1 100644
--- a/libsolidity/codegen/ir/IRGeneratorForStatements.cpp
+++ b/libsolidity/codegen/ir/IRGeneratorForStatements.cpp
@@ -189,6 +189,16 @@ void IRGeneratorForStatements::endVisit(Return const& _return)
 	m_code << "return_flag := 0\n" << "break\n";
 }
 
+void IRGeneratorForStatements::endVisit(UnaryOperation const& _unaryOperation)
+{
+	if (_unaryOperation.annotation().type->category() == Type::Category::RationalNumber)
+		defineExpression(_unaryOperation) <<
+			formatNumber(_unaryOperation.annotation().type->literalValue(nullptr)) <<
+			"\n";
+	else
+		solUnimplementedAssert(false, "");
+}
+
 void IRGeneratorForStatements::endVisit(BinaryOperation const& _binOp)
 {
 	solAssert(!!_binOp.annotation().commonType, "");
diff --git a/libsolidity/codegen/ir/IRGeneratorForStatements.h b/libsolidity/codegen/ir/IRGeneratorForStatements.h
index f68e9042f..af5dd89a2 100644
--- a/libsolidity/codegen/ir/IRGeneratorForStatements.h
+++ b/libsolidity/codegen/ir/IRGeneratorForStatements.h
@@ -51,6 +51,7 @@ public:
 	bool visit(Continue const& _continueStatement) override;
 	bool visit(Break const& _breakStatement) override;
 	void endVisit(Return const& _return) override;
+	void endVisit(UnaryOperation const& _unaryOperation) override;
 	void endVisit(BinaryOperation const& _binOp) override;
 	void endVisit(FunctionCall const& _funCall) override;
 	bool visit(InlineAssembly const& _inlineAsm) override;