diff --git a/libraries/Arduino_Mega_ISR_Registry/Arduino_Mega_ISR_Registry.h b/libraries/Arduino_Mega_ISR_Registry/Arduino_Mega_ISR_Registry.h
index 0bd51539f7..420d3e3e4e 100644
--- a/libraries/Arduino_Mega_ISR_Registry/Arduino_Mega_ISR_Registry.h
+++ b/libraries/Arduino_Mega_ISR_Registry/Arduino_Mega_ISR_Registry.h
@@ -11,12 +11,12 @@ typedef void (*proc_ptr)(void);
 
 class Arduino_Mega_ISR_Registry
 {
-    public:
-    void init();
-    int register_signal(int isr_number, proc_ptr proc);
-    int unregister_signal(int isr_number);
+public:
+    void                    init();
+    int                     register_signal(int isr_number, proc_ptr proc);
+    int                     unregister_signal(int isr_number);
 
-    static proc_ptr _registry[ISR_REGISTRY_NUM_SLOTS];
+    static proc_ptr         _registry[ISR_REGISTRY_NUM_SLOTS];
 };
 
 #endif // __ARDUINO_MEGA_ISR_REGISTRY_H__