diff --git a/documentation/memory/memory.md b/documentation/memory/memory.md
index 35c492da48ea68c4bc66bbd6beffb489938f464b..892107fd7517f2de0eaa5aae338e3178d0c2e448 100644
--- a/documentation/memory/memory.md
+++ b/documentation/memory/memory.md
@@ -233,7 +233,7 @@ Input parameters for rt_malloc_sethook()
 The hook function interface is as follows:
 
 ```c
-void hook(void *ptr, rt_size_t size)；
+void hook(void *ptr, rt_size_t size);
 ```
 
 The following table describes the input parameters for the hook function: