diff --git a/cores/esp8266/Arduino.h b/cores/esp8266/Arduino.h
index 4c78bd66c..e0d29efb5 100644
--- a/cores/esp8266/Arduino.h
+++ b/cores/esp8266/Arduino.h
@@ -76,8 +76,11 @@ void yield(void);
 #define degrees(rad) ((rad)*RAD_TO_DEG)
 #define sq(x) ((x)*(x))
 
-#define interrupts() sei()
-#define noInterrupts() cli()
+void ets_intr_lock();
+void ets_intr_unlock();
+
+#define interrupts() ets_intr_unlock();
+#define noInterrupts() ets_intr_lock();
 
 #define clockCyclesPerMicrosecond() ( F_CPU / 1000000L )
 #define clockCyclesToMicroseconds(a) ( (a) / clockCyclesPerMicrosecond() )