diff --git a/Grbl_Esp32/src/Pin.h b/Grbl_Esp32/src/Pin.h
index dae6f148..3a433a2e 100644
--- a/Grbl_Esp32/src/Pin.h
+++ b/Grbl_Esp32/src/Pin.h
@@ -124,8 +124,8 @@ public:
         return _detail->_index;
     }
 
-    inline IRAM_ATTR void write(bool value) const { _detail->write(value); }
-    inline void           synchronousWrite(bool value) const { _detail->synchronousWrite(value); }
+    inline void IRAM_ATTR write(bool value) const { _detail->write(value); }
+    inline void IRAM_ATTR synchronousWrite(bool value) const { _detail->synchronousWrite(value); }
 
     inline bool read() const { return _detail->read() != 0; }