diff --git a/llvm/include/llvm/DebugInfo/DWARF/DWARFListTable.h b/llvm/include/llvm/DebugInfo/DWARF/DWARFListTable.h
--- a/llvm/include/llvm/DebugInfo/DWARF/DWARFListTable.h
+++ b/llvm/include/llvm/DebugInfo/DWARF/DWARFListTable.h
@@ -170,7 +170,8 @@
   Error extract(DWARFDataExtractor Data, uint64_t *OffsetPtr);
   /// Look up a list based on a given offset. Extract it and enter it into the
   /// list map if necessary.
-  Expected<DWARFListType> findList(DWARFDataExtractor Data, uint64_t Offset);
+  Expected<DWARFListType> findList(DWARFDataExtractor Data,
+                                   uint64_t Offset) const;
 
   uint64_t getHeaderOffset() const { return Header.getHeaderOffset(); }
   uint8_t getAddrSize() const { return Header.getAddrSize(); }
@@ -275,7 +276,7 @@
 template <typename DWARFListType>
 Expected<DWARFListType>
 DWARFListTableBase<DWARFListType>::findList(DWARFDataExtractor Data,
-                                            uint64_t Offset) {
+                                            uint64_t Offset) const {
   // Extract the list from the section and enter it into the list map.
   DWARFListType List;
   if (Header.length())