diff --git a/cores/esp8266/coredecls.h b/cores/esp8266/coredecls.h
index e5573792b..e06dc6029 100644
--- a/cores/esp8266/coredecls.h
+++ b/cores/esp8266/coredecls.h
@@ -2,8 +2,6 @@
 #ifndef __COREDECLS_H
 #define __COREDECLS_H
 
-#define HAVE_ESP_SUSPEND 1
-
 #include "core_esp8266_features.h"
 
 #ifdef __cplusplus