diff --git a/lib/pddlparse/src/pddlparse/detail/parsing/PrimitiveType.cpp b/lib/pddlparse/src/pddlparse/detail/parsing/PrimitiveType.cpp
index 51adee6..d45aece 100644
--- a/lib/pddlparse/src/pddlparse/detail/parsing/PrimitiveType.cpp
+++ b/lib/pddlparse/src/pddlparse/detail/parsing/PrimitiveType.cpp
@@ -24,7 +24,7 @@ ast::PrimitiveTypePointer parsePrimitiveType(Context &context, ast::Domain &doma
 	auto typeName = tokenizer.getIdentifier();
 
 	if (typeName.empty())
-		throw tokenize::TokenizerException(tokenizer.location(), "no type supplied");
+		throw tokenize::TokenizerException(tokenizer.location(), "could not parse primitive type, expected identifier");
 
 	auto matchingType = std::find_if(types.begin(), types.end(),
 		[&](auto &primitiveTypeDeclaration)