Index: include/lldb/Utility/UUID.h
===================================================================
--- include/lldb/Utility/UUID.h
+++ include/lldb/Utility/UUID.h
@@ -46,7 +46,7 @@
 
   const void *GetBytes() const;
 
-  size_t GetByteSize();
+  size_t GetByteSize() const;
 
   bool IsValid() const;
 
Index: source/Utility/UUID.cpp
===================================================================
--- source/Utility/UUID.cpp
+++ source/Utility/UUID.cpp
@@ -109,7 +109,7 @@
   return false;
 }
 
-size_t UUID::GetByteSize() { return m_num_uuid_bytes; }
+size_t UUID::GetByteSize() const { return m_num_uuid_bytes; }
 
 bool UUID::IsValid() const {
   return m_uuid[0] || m_uuid[1] || m_uuid[2] || m_uuid[3] || m_uuid[4] ||