diff --git a/CHANGELOG.md b/CHANGELOG.md
index 31b21688..e786528b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@ HEAD
 ----
 
 * Fixed invalid conversion error in `operator|(JsonVariant, char*)` (issue #1432)
+* Changed the default value of `ARDUINOJSON_ENABLE_PROGMEM` (issue #1433).
+  It now checks that the `pgm_read_XXX` macros are defined before enabling `PROGMEM`.
 
 v6.17.1 (2020-11-07)
 -------
diff --git a/src/ArduinoJson/Configuration.hpp b/src/ArduinoJson/Configuration.hpp
index 32a6f339..53021201 100644
--- a/src/ArduinoJson/Configuration.hpp
+++ b/src/ArduinoJson/Configuration.hpp
@@ -172,7 +172,8 @@
 #endif  // ARDUINO
 
 #ifndef ARDUINOJSON_ENABLE_PROGMEM
-#ifdef PROGMEM
+#if defined(PROGMEM) && defined(pgm_read_byte) && defined(pgm_read_dword) && \
+    defined(pgm_read_ptr) && defined(pgm_read_float)
 #define ARDUINOJSON_ENABLE_PROGMEM 1
 #else
 #define ARDUINOJSON_ENABLE_PROGMEM 0