diff --git a/cores/esp32/WString.h b/cores/esp32/WString.h
index e045538c5cb..11b12aa08a5 100644
--- a/cores/esp32/WString.h
+++ b/cores/esp32/WString.h
@@ -35,7 +35,8 @@ class StringSumHelper;
 // an abstract class used as a means to proide a unique pointer type
 // but really has no body
 class __FlashStringHelper;
-#define F(string_literal) (reinterpret_cast<const __FlashStringHelper *>(PSTR(string_literal)))
+#define FPSTR(pstr_pointer) (reinterpret_cast<const __FlashStringHelper *>(pstr_pointer))
+#define F(string_literal) (FPSTR(PSTR(string_literal)))
 
 // The string class
 class String {
diff --git a/cores/esp32/pgmspace.h b/cores/esp32/pgmspace.h
index c2bee48ce9e..aa58775ff57 100644
--- a/cores/esp32/pgmspace.h
+++ b/cores/esp32/pgmspace.h
@@ -32,7 +32,6 @@ typedef unsigned long prog_uint32_t;
 #define PROGMEM
 #define PGM_P         const char *
 #define PGM_VOID_P    const void *
-#define FPSTR(p)      ((const char *)(p))
 #define PSTR(s)       (s)
 #define _SFR_BYTE(n)  (n)