diff --git a/libraries/ESP8266HTTPClient/src/ESP8266HTTPClient.h b/libraries/ESP8266HTTPClient/src/ESP8266HTTPClient.h
index fb9cfa873..d2768d85b 100644
--- a/libraries/ESP8266HTTPClient/src/ESP8266HTTPClient.h
+++ b/libraries/ESP8266HTTPClient/src/ESP8266HTTPClient.h
@@ -35,7 +35,7 @@
 
 #ifdef DEBUG_ESP_HTTP_CLIENT
 #ifdef DEBUG_ESP_PORT
-#define DEBUG_HTTPCLIENT(...) DEBUG_ESP_PORT.printf( __VA_ARGS__ )
+#define DEBUG_HTTPCLIENT(fmt, ...) DEBUG_ESP_PORT.printf_P( (PGM_P)PSTR(fmt), ## __VA_ARGS__ )
 #endif
 #endif