diff --git a/libsolidity/codegen/ir/IRGeneratorForStatements.cpp b/libsolidity/codegen/ir/IRGeneratorForStatements.cpp
index 4a2019f4c..9fdc1556e 100644
--- a/libsolidity/codegen/ir/IRGeneratorForStatements.cpp
+++ b/libsolidity/codegen/ir/IRGeneratorForStatements.cpp
@@ -1944,9 +1944,9 @@ void IRGeneratorForStatements::endVisit(MemberAccess const& _memberAccess)
 		else if (member == "typehash")
 		{
 			Type const* arg = dynamic_cast<MagicType const&>(*_memberAccess.expression().annotation().type).typeArgument();
-			solAssert(arg != nullptr);
+			solAssert(!arg);
 			StructType const* structType = dynamic_cast<StructType const*>(arg);
-			solAssert(structType != nullptr);
+			solAssert(!structType);
 			StructDefinition const& struct_ = structType->structDefinition();
 			define(_memberAccess) << "0x" << toHex(struct_.typehash()) << "\n";
 		}