diff --git a/runtime/oat_file_assistant.h b/runtime/oat_file_assistant.h
index 63b1573..d3228de 100644
--- a/runtime/oat_file_assistant.h
+++ b/runtime/oat_file_assistant.h
@@ -279,7 +279,7 @@
   static bool DexFilenameToOdexFilename(const std::string& location,
       InstructionSet isa, std::string* odex_filename, std::string* error_msg);
 
-  static uint32_t CalculateCombinedImageChecksum();
+  static uint32_t CalculateCombinedImageChecksum(InstructionSet isa = kRuntimeISA);
 
  private:
   struct ImageInfo {