diff --git a/src/json-validator.cpp b/src/json-validator.cpp
index 1a801bd..276f6b4 100644
--- a/src/json-validator.cpp
+++ b/src/json-validator.cpp
@@ -171,7 +171,7 @@ public:
 		auto fragment = new_uri.pointer();
 
 		// is there a reference looking for this unknown-keyword, which is thus no longer a unknown keyword but a schema
-		auto unresolved = file.unresolved.find(fragment);
+		auto unresolved = file.unresolved.find(fragment.to_string());
 		if (unresolved != file.unresolved.end())
 			schema::make(value, this, {}, {{new_uri}});
 		else { // no, nothing ref'd it, keep for later
@@ -884,8 +884,8 @@ class boolean : public schema
 	{
 		if (!true_) { // false schema
 			// empty array
-			//switch (instance.type()) {
-			//case json::value_t::array:
+			// switch (instance.type()) {
+			// case json::value_t::array:
 			//	if (instance.size() != 0) // valid false-schema
 			//		e.error(ptr, instance, "false-schema required empty array");
 			//	return;
diff --git a/src/nlohmann/json-schema.hpp b/src/nlohmann/json-schema.hpp
index ebe7cef..07befd3 100644
--- a/src/nlohmann/json-schema.hpp
+++ b/src/nlohmann/json-schema.hpp
@@ -61,7 +61,7 @@ protected:
 
 	std::tuple<std::string, std::string, std::string, std::string, std::string> as_tuple() const
 	{
-		return std::make_tuple(urn_, scheme_, authority_, path_, identifier_ != "" ? identifier_ : pointer_);
+		return std::make_tuple(urn_, scheme_, authority_, path_, identifier_ != "" ? identifier_ : pointer_.to_string());
 	}
 
 public:
@@ -80,7 +80,7 @@ public:
 	std::string fragment() const
 	{
 		if (identifier_ == "")
-			return pointer_;
+			return pointer_.to_string();
 		else
 			return identifier_;
 	}