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-rw-r--r--include/os.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/os.h b/include/os.h
index fd010cfee83..d2a4afeca0f 100644
--- a/include/os.h
+++ b/include/os.h
@@ -123,7 +123,8 @@ void *os_malloc(size_t length);
*
* This returns the memory to the OS.
*
- * @ptr: Pointer to memory block to free
+ * @ptr: Pointer to memory block to free. If this is NULL then this
+ * function does nothing
*/
void os_free(void *ptr);