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-rw-r--r--src/osal/osal.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/osal/osal.h b/src/osal/osal.h
index 9cdab2882..afa3826fc 100644
--- a/src/osal/osal.h
+++ b/src/osal/osal.h
@@ -44,7 +44,7 @@ typedef void (*osal_task_func_t)( void * );
// Mutex is required when using a preempted RTOS or MCU has multiple cores
#if (CFG_TUSB_OS == OPT_OS_NONE) && !TUP_MCU_MULTIPLE_CORE
#define OSAL_MUTEX_REQUIRED 0
- #define OSAL_MUTEX_DEF(_name)
+ #define OSAL_MUTEX_DEF(_name) uint8_t :0
#else
#define OSAL_MUTEX_REQUIRED 1
#define OSAL_MUTEX_DEF(_name) osal_mutex_def_t _name