diff --git a/include/rtthread.h b/include/rtthread.h
index 5cfa3c26b1..45bbacdf3d 100644
--- a/include/rtthread.h
+++ b/include/rtthread.h
@@ -272,9 +272,9 @@ void rt_mp_free_sethook(void (*hook)(struct rt_mempool *mp, void *block));
  */
 void rt_system_heap_init(void *begin_addr, void *end_addr);
 
-void *rt_malloc(rt_size_t nbytes);
+void *rt_malloc(rt_size_t size);
 void rt_free(void *ptr);
-void *rt_realloc(void *ptr, rt_size_t nbytes);
+void *rt_realloc(void *ptr, rt_size_t newsize);
 void *rt_calloc(rt_size_t count, rt_size_t size);
 void *rt_malloc_align(rt_size_t size, rt_size_t align);
 void rt_free_align(void *ptr);
diff --git a/src/kservice.c b/src/kservice.c
index ecae2f72ec..6638173f2d 100644
--- a/src/kservice.c
+++ b/src/kservice.c
@@ -1692,13 +1692,13 @@ RTM_EXPORT(rt_malloc);
 /**
  * @brief This function will change the size of previously allocated memory block.
  *
- * @param rmem is the pointer to memory allocated by rt_malloc.
+ * @param ptr is the pointer to memory allocated by rt_malloc.
  *
  * @param newsize is the required new size.
  *
  * @return the changed memory block address.
  */
-rt_weak void *rt_realloc(void *rmem, rt_size_t newsize)
+rt_weak void *rt_realloc(void *ptr, rt_size_t newsize)
 {
     rt_base_t level;
     void *nptr;
@@ -1706,7 +1706,7 @@ rt_weak void *rt_realloc(void *rmem, rt_size_t newsize)
     /* Enter critical zone */
     level = _heap_lock();
     /* Change the size of previously allocated memory block */
-    nptr = _MEM_REALLOC(rmem, newsize);
+    nptr = _MEM_REALLOC(ptr, newsize);
     /* Exit critical zone */
     _heap_unlock(level);
     return nptr;
@@ -1745,19 +1745,19 @@ RTM_EXPORT(rt_calloc);
  * @brief This function will release the previously allocated memory block by
  *        rt_malloc. The released memory block is taken back to system heap.
  *
- * @param rmem the address of memory which will be released.
+ * @param ptr the address of memory which will be released.
  */
-rt_weak void rt_free(void *rmem)
+rt_weak void rt_free(void *ptr)
 {
     rt_base_t level;
 
     /* call 'rt_free' hook */
-    RT_OBJECT_HOOK_CALL(rt_free_hook, (rmem));
+    RT_OBJECT_HOOK_CALL(rt_free_hook, (ptr));
     /* NULL check */
-    if (rmem == RT_NULL) return;
+    if (ptr == RT_NULL) return;
     /* Enter critical zone */
     level = _heap_lock();
-    _MEM_FREE(rmem);
+    _MEM_FREE(ptr);
     /* Exit critical zone */
     _heap_unlock(level);
 }