diff --git a/js/dune b/js/dune
deleted file mode 100644
index 589f6043..00000000
--- a/js/dune
+++ /dev/null
@@ -1,4 +0,0 @@
-(install
- (section lib)
- (files cstruct.js)
- (package cstruct))
diff --git a/js/cstruct.js b/lib/cstruct.js
similarity index 74%
rename from js/cstruct.js
rename to lib/cstruct.js
index d7f0e415..e9e2ee49 100644
--- a/js/cstruct.js
+++ b/lib/cstruct.js
@@ -14,26 +14,6 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-//Provides: caml_blit_string_to_bigstring
-//Requires: caml_ba_set_1, caml_string_unsafe_get
-function caml_blit_string_to_bigstring(str, str_off, buf, buf_off, len) {
-  var i;
-  for (i = 0; i < len; i++) {
-    caml_ba_set_1(buf, buf_off + i, caml_string_unsafe_get(str, str_off + i));
-  }
-  return 0;
-}
-
-//Provides: caml_blit_bigstring_to_string
-//Requires: caml_ba_get_1, caml_string_unsafe_set
-function caml_blit_bigstring_to_string(buf, buf_off, str, str_off, len) {
-  var i;
-  for (i = 0; i < len; i++) {
-    caml_string_unsafe_set(str, str_off + i, caml_ba_get_1(buf, buf_off + i));
-  }
-  return 0;
-}
-
 //Provides: caml_blit_bigstring_to_bigstring
 //Requires: caml_ba_get_1, caml_ba_set_1
 function caml_blit_bigstring_to_bigstring(src, src_off, dst, dst_off, len) {
diff --git a/lib/dune b/lib/dune
index 8cd0a654..54b0d372 100644
--- a/lib/dune
+++ b/lib/dune
@@ -3,6 +3,7 @@
  (public_name cstruct)
  (libraries bigarray)
  (c_names cstruct_stubs)
+ (js_of_ocaml (javascript_files cstruct.js))
  (modules cstruct))
 
 (library