diff --git a/lib/pddlparse/src/pddlparse/detail/parsing/PrimitiveType.cpp b/lib/pddlparse/src/pddlparse/detail/parsing/PrimitiveType.cpp
index 5bdc006..7f6fa38 100644
--- a/lib/pddlparse/src/pddlparse/detail/parsing/PrimitiveType.cpp
+++ b/lib/pddlparse/src/pddlparse/detail/parsing/PrimitiveType.cpp
@@ -33,10 +33,14 @@ ast::PrimitiveTypePointer parsePrimitiveType(Context &context, ast::Domain &doma
 	// If the type has not been declared yet, add it but issue a warning
 	if (matchingType == types.end())
 	{
-		if (context.mode != Mode::Compatibility)
-			throw ParserException(tokenizer, "primitive type “" + typeName + "” used without or before declaration");
+		// “object” type is always allowed without warning
+		if (typeName != "object")
+		{
+			if (context.mode != Mode::Compatibility)
+				throw ParserException(tokenizer, "primitive type “" + typeName + "” used without or before declaration");
 
-		context.warningCallback(tokenizer, "primitive type “" + typeName + "” used without or before declaration, silently adding declaration");
+			context.warningCallback(tokenizer, "primitive type “" + typeName + "” used without or before declaration, silently adding declaration");
+		}
 
 		types.emplace_back(std::make_unique<ast::PrimitiveTypeDeclaration>(std::move(typeName)));