diff --git a/scheme/ikarus.hash-tables.ss b/scheme/ikarus.hash-tables.ss
index 8bc7493..21a33fe 100644
--- a/scheme/ikarus.hash-tables.ss
+++ b/scheme/ikarus.hash-tables.ss
@@ -18,7 +18,8 @@
    (export make-eq-hashtable hashtable-ref hashtable-set! hashtable?
            hashtable-size hashtable-delete! hashtable-contains?
            hashtable-update! hashtable-keys hashtable-mutable?
-           hashtable-clear! hashtable-entries hashtable-copy)
+           hashtable-clear! hashtable-entries hashtable-copy
+           string-hash)
    (import 
      (ikarus system $pairs)
      (ikarus system $vectors)
@@ -27,7 +28,8 @@
      (except (ikarus) make-eq-hashtable hashtable-ref hashtable-set! hashtable?
              hashtable-size hashtable-delete! hashtable-contains?
              hashtable-update! hashtable-keys hashtable-mutable?
-             hashtable-clear! hashtable-entries hashtable-copy))
+             hashtable-clear! hashtable-entries hashtable-copy
+             string-hash))
 
    (define-struct hasht (vec count tc mutable?))
 
@@ -404,4 +406,9 @@
                h)
            (error 'hashtable-copy "not a hash table" h))]))
 
+  (define (string-hash s)
+    (if (string? s) 
+        (foreign-call "ikrt_string_hash" s)
+        (error 'string-hash "not a string" s)))
+
 )
diff --git a/scheme/last-revision b/scheme/last-revision
index 2b4ff56..1b6d75c 100644
--- a/scheme/last-revision
+++ b/scheme/last-revision
@@ -1 +1 @@
-1114
+1115
diff --git a/scheme/makefile.ss b/scheme/makefile.ss
index 8ebf8b8..90008ed 100755
--- a/scheme/makefile.ss
+++ b/scheme/makefile.ss
@@ -1192,7 +1192,7 @@
     [make-hashtable                              r ht]
     [hashtable-equivalence-function              r ht]
     [equal-hash                                  r ht]
-    [string-hash                                 r ht]
+    [string-hash                                 i r ht]
     [string-ci-hash                              r ht]
     [symbol-hash                                 r ht]
     [list-sort                                   i r sr]
diff --git a/scheme/todo-r6rs.ss b/scheme/todo-r6rs.ss
index 25bccbe..cc25e1d 100755
--- a/scheme/todo-r6rs.ss
+++ b/scheme/todo-r6rs.ss
@@ -565,7 +565,7 @@
     [flush-output-port                          C ip]
     [get-bytevector-all                         S ip]
     [get-bytevector-n                           C ip]
-    [get-bytevector-n!                          S ip]
+    [get-bytevector-n!                          C ip]
     [get-bytevector-some                        S ip]
     [get-char                                   C ip]
     [get-datum                                  C ip]
@@ -699,7 +699,7 @@
     [make-hashtable                             S ht]
     [hashtable-equivalence-function             S ht]
     [equal-hash                                 S ht]
-    [string-hash                                S ht]
+    [string-hash                                C ht]
     [string-ci-hash                             S ht]
     [symbol-hash                                S ht]
     ;;;
diff --git a/src/ikarus-symbol-table.c b/src/ikarus-symbol-table.c
index a355e98..41871a2 100644
--- a/src/ikarus-symbol-table.c
+++ b/src/ikarus-symbol-table.c
@@ -51,6 +51,11 @@ compute_hash(ikp str){
   return h;
 }
 
+ikp 
+ikrt_string_hash(ikp str){
+  return fix(compute_hash(str));
+}
+
 static int strings_eqp(ikp str1, ikp str2){
   ikp len = ref(str1, off_string_length);
   if(len == ref(str2, off_string_length)){