diff --git a/src/H5CS.c b/src/H5CS.c
index 3e5b6b8401c..3728273ea2a 100644
--- a/src/H5CS.c
+++ b/src/H5CS.c
@@ -228,10 +228,9 @@ H5CS_pop(void)
 H5CS_t *
 H5CS_copy_stack(void)
 {
-    H5CS_t  *old_stack = H5CS_get_my_stack(); /* Existing function stack for library */
-    H5CS_t  *new_stack;                       /* New function stack, for copy */
-    unsigned u;                               /* Local index variable */
-    H5CS_t  *ret_value = NULL;                /* Return value */
+    H5CS_t *old_stack = H5CS_get_my_stack(); /* Existing function stack for library */
+    H5CS_t *new_stack;                       /* New function stack, for copy */
+    H5CS_t *ret_value = NULL;                /* Return value */
 
     /* Don't push this function on the function stack... :-) */
     FUNC_ENTER_NOAPI_NOFS
@@ -270,8 +269,6 @@ H5CS_copy_stack(void)
 herr_t
 H5CS_close_stack(H5CS_t *stack)
 {
-    unsigned u; /* Local index variable */
-
     /* Don't push this function on the function stack... :-) */
     FUNC_ENTER_NOAPI_NOERR_NOFS