diff --git a/api/deprecated-avr-comp/avr/pgmspace.h b/api/deprecated-avr-comp/avr/pgmspace.h
index 95897d75..a80e4a51 100644
--- a/api/deprecated-avr-comp/avr/pgmspace.h
+++ b/api/deprecated-avr-comp/avr/pgmspace.h
@@ -30,7 +30,9 @@
 #include <inttypes.h>
 
 #define PROGMEM
+#define __ATTR_PROGMEM__ 
 #define PGM_P  const char *
+#define PGM_VOID_P const void *
 #define PSTR(str) (str)
 
 #define _SFR_BYTE(n) (n)