diff --git a/tinyusb/osal/osal_none.c b/tinyusb/osal/osal_none.c
index b30f7ecda..4c8eb7aca 100644
--- a/tinyusb/osal/osal_none.c
+++ b/tinyusb/osal/osal_none.c
@@ -49,19 +49,11 @@
 //--------------------------------------------------------------------+
 // INTERNAL OBJECT & FUNCTION DECLARATION
 //--------------------------------------------------------------------+
-static volatile uint32_t osal_tick_current = 0;
+volatile uint32_t osal_tick_current = 0;
 
 //--------------------------------------------------------------------+
 // IMPLEMENTATION
 //--------------------------------------------------------------------+
-uint32_t osal_tick_get(void)
-{
-  return osal_tick_current;
-}
 
-void osal_tick_tock(void)
-{
-  osal_tick_current++;
-}
 
 #endif
diff --git a/tinyusb/osal/osal_none.h b/tinyusb/osal/osal_none.h
index 7d59d5257..da42a969a 100644
--- a/tinyusb/osal/osal_none.h
+++ b/tinyusb/osal/osal_none.h
@@ -60,8 +60,18 @@
 //--------------------------------------------------------------------+
 // TICK API
 //--------------------------------------------------------------------+
-void osal_tick_tock(void);
-uint32_t osal_tick_get(void);
+extern volatile uint32_t osal_tick_current;
+static inline void osal_tick_tock(void) ATTR_ALWAYS_INLINE;
+static inline void osal_tick_tock(void)
+{
+  osal_tick_current++;
+}
+
+static inline uint32_t osal_tick_get(void) ATTR_ALWAYS_INLINE;
+static inline uint32_t osal_tick_get(void)
+{
+  return osal_tick_current;
+}
 
 //--------------------------------------------------------------------+
 // TASK API