diff --git a/include/SDL3/SDL_log.h b/include/SDL3/SDL_log.h
index 3fd7ec2ede..2019c3b462 100644
--- a/include/SDL3/SDL_log.h
+++ b/include/SDL3/SDL_log.h
@@ -206,6 +206,9 @@ extern SDL_DECLSPEC void SDLCALL SDL_ResetLogPriorities(void);
  * SDL_LOG_PRIORITY_WARN and higher have a prefix showing their priority, e.g.
  * "WARNING: ".
  *
+ * This function makes a copy of its string argument, **prefix**, so it is not
+ * necessary to keep the value of **prefix** alive after the call returns.
+ *
  * \param priority the SDL_LogPriority to modify.
  * \param prefix the prefix to use for that log priority, or NULL to use no
  *               prefix.