diff --git a/compiler/optimizing/code_generator_mips64.h b/compiler/optimizing/code_generator_mips64.h
index 8ac919f..df78830 100644
--- a/compiler/optimizing/code_generator_mips64.h
+++ b/compiler/optimizing/code_generator_mips64.h
@@ -411,7 +411,8 @@
     Mips64Label pc_rel_label;
   };
 
-  PcRelativePatchInfo* NewPcRelativeStringPatch(const DexFile& dex_file, uint32_t string_index);
+  PcRelativePatchInfo* NewPcRelativeStringPatch(const DexFile& dex_file,
+                                                dex::StringIndex string_index);
   PcRelativePatchInfo* NewPcRelativeTypePatch(const DexFile& dex_file, dex::TypeIndex type_index);
   PcRelativePatchInfo* NewPcRelativeDexCacheArrayPatch(const DexFile& dex_file,
                                                        uint32_t element_offset);
@@ -469,7 +470,7 @@
   ArenaDeque<PcRelativePatchInfo> pc_relative_string_patches_;
   // Deduplication map for boot type literals for kBootImageLinkTimeAddress.
   BootTypeToLiteralMap boot_image_type_patches_;
-  // PC-relative type patch info.
+  // PC-relative type patch info; type depends on configuration (app .bss or boot image PIC).
   ArenaDeque<PcRelativePatchInfo> pc_relative_type_patches_;
   // Deduplication map for patchable boot image addresses.
   Uint32ToLiteralMap boot_image_address_patches_;