diff --git a/ports/cef/lib.rs b/ports/cef/lib.rs
index ca96b5283e2..ae689e33ee1 100644
--- a/ports/cef/lib.rs
+++ b/ports/cef/lib.rs
@@ -52,6 +52,7 @@ pub mod request;
 pub mod string;
 pub mod string_list;
 pub mod string_map;
+pub mod string_multimap;
 pub mod task;
 pub mod types;
 pub mod urlrequest;
diff --git a/ports/cef/string_multimap.rs b/ports/cef/string_multimap.rs
new file mode 100644
index 00000000000..35c848750e9
--- /dev/null
+++ b/ports/cef/string_multimap.rs
@@ -0,0 +1,22 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use eutil::slice_to_str;
+use libc::{c_int};
+use std::collections::TreeMap;
+use std::mem;
+use std::string::String;
+use string::{cef_string_userfree_utf8_alloc,cef_string_userfree_utf8_free,cef_string_utf8_set};
+use types::{cef_string_multimap_t,cef_string_t};
+
+
+//cef_string_multimap
+
+#[no_mangle]
+pub extern "C" fn cef_string_multimap_alloc() -> *mut cef_string_multimap_t {
+    unsafe {
+         let smm: Box<TreeMap<String, Vec<*mut cef_string_t>>> = box TreeMap::new();
+         mem::transmute(smm)
+    }
+}
diff --git a/ports/cef/types.rs b/ports/cef/types.rs
index 4484ffe7787..e1815f3f89d 100644
--- a/ports/cef/types.rs
+++ b/ports/cef/types.rs
@@ -5,10 +5,11 @@
 use libc::{c_uint, c_ushort, c_int, c_double, size_t, c_void, c_longlong};
 use libc::types::os::arch::c95::wchar_t;
 
-pub enum cef_string_map_t {}
-pub enum cef_string_list_t {}
-pub enum cef_text_input_context_t {}
-pub enum cef_event_handle_t {}
+pub type cef_string_map_t = c_void;
+pub type cef_string_multimap_t = c_void;
+pub type cef_string_list_t = c_void;
+pub type cef_text_input_context_t = c_void;
+pub type cef_event_handle_t = c_void;
 
 //these all need to be done...
 pub enum cef_binary_value_val {}