diff --git a/llvm/include/llvm/MC/StringTableBuilder.h b/llvm/include/llvm/MC/StringTableBuilder.h
index 3164351d6564..f38247702eb3 100644
--- a/llvm/include/llvm/MC/StringTableBuilder.h
+++ b/llvm/include/llvm/MC/StringTableBuilder.h
@@ -41,7 +41,7 @@ public:
 
   /// \brief Retrieve the string table data. Can only be used after the table
   /// is finalized.
-  StringRef data() {
+  StringRef data() const {
     assert(isFinalized());
     return StringTable;
   }