diff --git a/tools/aapt2/ResourceValues.h b/tools/aapt2/ResourceValues.h
index 6f9dccb..5192c2b 100644
--- a/tools/aapt2/ResourceValues.h
+++ b/tools/aapt2/ResourceValues.h
@@ -284,6 +284,7 @@
   bool Equals(const Value* value) const override;
   bool Flatten(android::Res_value* out_value) const override;
   void Print(std::ostream* out) const override;
+  static const char* DecideFormat(float f);
   void PrettyPrint(text::Printer* printer) const override;
 };