diff --git a/cores/esp32/WString.h b/cores/esp32/WString.h
index 11b12aa08a5..e045538c5cb 100644
--- a/cores/esp32/WString.h
+++ b/cores/esp32/WString.h
@@ -35,8 +35,7 @@ class StringSumHelper;
 // an abstract class used as a means to proide a unique pointer type
 // but really has no body
 class __FlashStringHelper;
-#define FPSTR(pstr_pointer) (reinterpret_cast<const __FlashStringHelper *>(pstr_pointer))
-#define F(string_literal) (FPSTR(PSTR(string_literal)))
+#define F(string_literal) (reinterpret_cast<const __FlashStringHelper *>(PSTR(string_literal)))
 
 // The string class
 class String {