diff --git a/src/osal/osal_freertos.h b/src/osal/osal_freertos.h
index 48b10616..639501bb 100644
--- a/src/osal/osal_freertos.h
+++ b/src/osal/osal_freertos.h
@@ -24,15 +24,10 @@
  * This file is part of the TinyUSB stack.
  */
 
-/** \ingroup group_osal
- * @{
- *  \defgroup Group_FreeRTOS  FreeRTOS
- *  @{ */
-
 #ifndef _TUSB_OSAL_FREERTOS_H_
 #define _TUSB_OSAL_FREERTOS_H_
 
-//------------- FreeRTOS Headers -------------//
+// FreeRTOS Headers
 #include "FreeRTOS.h"
 #include "semphr.h"
 #include "queue.h"
@@ -42,14 +37,6 @@
 extern "C" {
 #endif
 
-#if 0
-// Helper to determine if we are in ISR to use ISR API (only cover ARM Cortex)
-static inline bool in_isr(void)
-{
-  return (SCB->ICSR & SCB_ICSR_VECTACTIVE_Msk);
-}
-#endif
-
 //--------------------------------------------------------------------+
 // TASK API
 //--------------------------------------------------------------------+
@@ -148,6 +135,3 @@ static inline void osal_queue_reset(osal_queue_t const queue_hdl)
 #endif
 
 #endif /* _TUSB_OSAL_FREERTOS_H_ */
-
-/** @} */
-/** @} */
diff --git a/src/osal/osal_none.h b/src/osal/osal_none.h
index 24123467..b7989b04 100644
--- a/src/osal/osal_none.h
+++ b/src/osal/osal_none.h
@@ -24,10 +24,6 @@
  * This file is part of the TinyUSB stack.
  */
 
-/** \ingroup group_osal
- * \defgroup Group_OSNone None OS
- *  @{ */
-
 #ifndef _TUSB_OSAL_NONE_H_
 #define _TUSB_OSAL_NONE_H_
 
@@ -205,5 +201,3 @@ static inline bool osal_queue_receive(osal_queue_t const qhdl, void* data)
 #endif
 
 #endif /* _TUSB_OSAL_NONE_H_ */
-
-/** @} */