diff --git a/hardware/arduino/esp8266/cores/esp8266/Arduino.h b/hardware/arduino/esp8266/cores/esp8266/Arduino.h
index 4c78bd66c..e0d29efb5 100644
--- a/hardware/arduino/esp8266/cores/esp8266/Arduino.h
+++ b/hardware/arduino/esp8266/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() )
diff --git a/hardware/tools/esp8266/sdk/include/ets_sys.h b/hardware/tools/esp8266/sdk/include/ets_sys.h
index 8080f75e0..5b4c62480 100644
--- a/hardware/tools/esp8266/sdk/include/ets_sys.h
+++ b/hardware/tools/esp8266/sdk/include/ets_sys.h
@@ -81,7 +81,6 @@ typedef struct _ETSTIMER_ {
     ETS_INTR_DISABLE(ETS_GPIO_INUM)
 
 
-void ets_isr_attach(int routine, void* something, void *buff);
 void *pvPortMalloc(size_t xWantedSize);
 void *pvPortRealloc(void* ptr, size_t xWantedSize);
 void pvPortFree(void *ptr);
@@ -107,7 +106,8 @@ void uart_div_modify(int no, int freq);
 void ets_isr_mask(int intr);
 void ets_isr_unmask(int intr);
 void ets_isr_attach(int intr, void *handler, void *arg);
-
+void ets_intr_lock();
+void ets_intr_unlock();
 
 
 #endif /* _ETS_SYS_H */