diff --git a/lldb/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.cpp b/lldb/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.cpp
index 112eb06e462fc..16ca90ad9dd40 100644
--- a/lldb/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.cpp
+++ b/lldb/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.cpp
@@ -1735,11 +1735,11 @@ void SymbolFileNativePDB::CacheFunctionNames() {
   }
 
   // Sort them before value searching is working properly.
-  m_func_full_names.Sort();
+  m_func_full_names.Sort(std::less<uint32_t>());
   m_func_full_names.SizeToFit();
-  m_func_method_names.Sort();
+  m_func_method_names.Sort(std::less<uint32_t>());
   m_func_method_names.SizeToFit();
-  m_func_base_names.Sort();
+  m_func_base_names.Sort(std::less<uint32_t>());
   m_func_base_names.SizeToFit();
 }
 
@@ -2426,7 +2426,7 @@ void SymbolFileNativePDB::BuildParentMap() {
 
   // After calling Append(), the type-name map needs to be sorted again to be
   // able to look up a type by its name.
-  m_type_base_names.Sort();
+  m_type_base_names.Sort(std::less<uint32_t>());
 
   // Now that we know the forward -> full mapping of all type indices, we can
   // re-write all the indices.  At the end of this process, we want a mapping