diff --git a/os/hal/osal/nil/osal.h b/os/hal/osal/nil/osal.h
index 807b660c2..ac6879554 100644
--- a/os/hal/osal/nil/osal.h
+++ b/os/hal/osal/nil/osal.h
@@ -22,8 +22,8 @@
  * @{
  */
 
-#ifndef _OSAL_H_
-#define _OSAL_H_
+#ifndef OSAL.H
+#define OSAL.H
 
 #include <stddef.h>
 #include <stdint.h>
@@ -947,6 +947,6 @@ static inline void osalMutexUnlock(mutex_t *mp) {
   chSemSignal((semaphore_t *)mp);
 }
 
-#endif /* _OSAL_H_ */
+#endif /* OSAL.H */
 
 /** @} */
diff --git a/os/hal/osal/os-less/ARMCMx/osal.h b/os/hal/osal/os-less/ARMCMx/osal.h
index 9843cef97..5fcf8af64 100644
--- a/os/hal/osal/os-less/ARMCMx/osal.h
+++ b/os/hal/osal/os-less/ARMCMx/osal.h
@@ -22,8 +22,8 @@
  * @{
  */
 
-#ifndef _OSAL_H_
-#define _OSAL_H_
+#ifndef OSAL.H
+#define OSAL.H
 
 #include <stddef.h>
 #include <stdint.h>
@@ -715,6 +715,6 @@ static inline void osalMutexObjectInit(mutex_t *mp) {
   *mp = 0;
 }
 
-#endif /* _OSAL_H_ */
+#endif /* OSAL.H */
 
 /** @} */
diff --git a/os/hal/osal/os-less/AVR/osal.h b/os/hal/osal/os-less/AVR/osal.h
index eeb348050..390ac833e 100644
--- a/os/hal/osal/os-less/AVR/osal.h
+++ b/os/hal/osal/os-less/AVR/osal.h
@@ -22,8 +22,8 @@
  * @{
  */
 
-#ifndef _OSAL_H_
-#define _OSAL_H_
+#ifndef OSAL.H
+#define OSAL.H
 
 #include <stddef.h>
 #include <stdint.h>
@@ -673,6 +673,6 @@ static inline void osalMutexObjectInit(mutex_t *mp) {
   *mp = 0;
 }
 
-#endif /* _OSAL_H_ */
+#endif /* OSAL.H */
 
 /** @} */
diff --git a/os/hal/osal/rt/osal.h b/os/hal/osal/rt/osal.h
index e755a1c4f..397ff8acc 100644
--- a/os/hal/osal/rt/osal.h
+++ b/os/hal/osal/rt/osal.h
@@ -22,8 +22,8 @@
  * @{
  */
 
-#ifndef _OSAL_H_
-#define _OSAL_H_
+#ifndef OSAL.H
+#define OSAL.H
 
 #include <stddef.h>
 #include <stdint.h>
@@ -936,6 +936,6 @@ static inline void osalMutexUnlock(mutex_t *mp) {
 #endif
 }
 
-#endif /* _OSAL_H_ */
+#endif /* OSAL.H */
 
 /** @} */