diff --git a/include/Commands.h b/include/Commands.h
index e0c3a1d..94c048b 100644
--- a/include/Commands.h
+++ b/include/Commands.h
@@ -1,3 +1,6 @@
+#ifndef COMMANDS_H
+#define COMMANDS_H
+
 enum Lights {
   BACKLIGHT = 0,
   FRONTLIGHT = 1
@@ -38,4 +41,6 @@ enum Command {
 
 typedef enum Command Command;
 typedef enum Scrolls Scrolls;
-typedef enum Lights Lights;
\ No newline at end of file
+typedef enum Lights Lights;
+
+#endif
\ No newline at end of file
diff --git a/include/Config.h b/include/Config.h
index 00097a4..89fc58d 100644
--- a/include/Config.h
+++ b/include/Config.h
@@ -1,3 +1,5 @@
+#ifndef CONFIG_H
+#define CONFIG_H
 /*-------- Pin definitions --------*/
 
 // Vertical motor top
@@ -69,4 +71,6 @@ const int SCROLL_ERROR_MS = 500;    // if sensor values don't change in this tim
 #define REC_COUNTDOWN_MS 5000      // In Recording mode, blink LED for the last X milliseconds
 
 #define UI_ON_MS          500       // General user interaction blink interval
-#define UI_OFF_MS         500
\ No newline at end of file
+#define UI_OFF_MS         500
+
+#endif
\ No newline at end of file
diff --git a/include/Motor.h b/include/Motor.h
index 03df795..3696e87 100644
--- a/include/Motor.h
+++ b/include/Motor.h
@@ -1,3 +1,6 @@
+#ifndef MOTOR_H
+#define MOTOR_H
+
 #include <Arduino.h>
 
 class Motor
@@ -13,3 +16,5 @@ public:
   void run(uint8_t speed, bool forward);
   void stop(bool freewheel);
 };
+
+#endif
\ No newline at end of file
diff --git a/include/States.h b/include/States.h
index 80da179..d7d9468 100644
--- a/include/States.h
+++ b/include/States.h
@@ -1,3 +1,6 @@
+#ifndef STATES_H
+#define STATES_H
+
 /*-------- State Definitions --------*/
 
 /**
@@ -71,4 +74,6 @@ bool transition_init_wait();
  * @return true 
  * @return false 
  */
-bool transition_wait_sercom();
\ No newline at end of file
+bool transition_wait_sercom();
+
+#endif
\ No newline at end of file