diff --git a/lib/roken/search.hin b/lib/roken/search.hin
index b4edcffbb..f8592c481 100644
--- a/lib/roken/search.hin
+++ b/lib/roken/search.hin
@@ -32,7 +32,7 @@ typedef	enum {
 
 ROKEN_CPP_START
 
-ROKEN_LIB_FUNCTION void	* ROKEN_LIB_CALL rk_tdelete(const void * __restrict, void ** __restrict,
+ROKEN_LIB_FUNCTION void	* ROKEN_LIB_CALL rk_tdelete(const void *, void **,
 		 int (*)(const void *, const void *));
 ROKEN_LIB_FUNCTION void	* ROKEN_LIB_CALL rk_tfind(const void *, void * const *,
 	       int (*)(const void *, const void *));
diff --git a/lib/roken/tsearch-test.c b/lib/roken/tsearch-test.c
index cc5b9a95b..b9d99635a 100644
--- a/lib/roken/tsearch-test.c
+++ b/lib/roken/tsearch-test.c
@@ -19,7 +19,7 @@ struct node {
     int order;
 };
 
-extern void *rk_tdelete(const void * __restrict, void ** __restrict,
+extern void *rk_tdelete(const void *, void **,
 		 int (*)(const void *, const void *));
 extern void *rk_tfind(const void *, void * const *,
 	       int (*)(const void *, const void *));
diff --git a/lib/roken/tsearch.c b/lib/roken/tsearch.c
index c51a64339..65328d367 100644
--- a/lib/roken/tsearch.c
+++ b/lib/roken/tsearch.c
@@ -113,7 +113,7 @@ rk_twalk(const void *vroot,
  * compar: function to carry out node comparisons
  */
 ROKEN_LIB_FUNCTION void *
-rk_tdelete(const void * __restrict vkey, void ** __restrict vrootp,
+rk_tdelete(const void * vkey, void ** vrootp,
 	int (*compar)(const void *, const void *))
 {
 	node_t **rootp = (node_t **)vrootp;