diff --git a/monitor/uuid.c b/monitor/uuid.c
index b6d6517..3d39a47 100644
--- a/monitor/uuid.c
+++ b/monitor/uuid.c
@@ -259,6 +259,11 @@ const char *uuid32_to_str(uint32_t uuid)
 	return "Unknown";
 }
 
+const char *uuid128_to_str(const unsigned char *uuid)
+{
+	return "Unknown";
+}
+
 const char *uuidstr_to_str(const char *uuid)
 {
 	uint32_t val;
diff --git a/monitor/uuid.h b/monitor/uuid.h
index 4d441c8..2a33c27 100644
--- a/monitor/uuid.h
+++ b/monitor/uuid.h
@@ -26,5 +26,6 @@
 
 const char *uuid16_to_str(uint16_t uuid);
 const char *uuid32_to_str(uint32_t uuid);
+const char *uuid128_to_str(const unsigned char *uuid);
 
 const char *uuidstr_to_str(const char *uuid);