diff --git a/components/script/dom/bindings/codegen/CodegenRust.py b/components/script/dom/bindings/codegen/CodegenRust.py
index 166ce3ab02f..b2e51eb4d2a 100644
--- a/components/script/dom/bindings/codegen/CodegenRust.py
+++ b/components/script/dom/bindings/codegen/CodegenRust.py
@@ -1810,6 +1810,7 @@ static Class: DOMJSClass = DOMJSClass {
             getElements: None,
             enumerate: None,
             thisObject: %s,
+            funToString: None,
         },
     },
     dom_class: %s
@@ -1853,7 +1854,7 @@ static PrototypeClass: JSClass = JSClass {
     hasInstance: None,
     construct: None,
     trace: None,
-    reserved: [0 as *mut libc::c_void; 25]
+    reserved: [0 as *mut libc::c_void; 26]
 };
 """ % {'name': name, 'slotCount': slotCount}
 
diff --git a/components/servo/Cargo.lock b/components/servo/Cargo.lock
index 9fbcfe932ff..8e5f2cf435f 100644
--- a/components/servo/Cargo.lock
+++ b/components/servo/Cargo.lock
@@ -889,7 +889,7 @@ dependencies = [
 [[package]]
 name = "js"
 version = "0.1.1"
-source = "git+https://github.com/servo/rust-mozjs#07523d8b3dd12276eb94a266e83c0b1d77aa4160"
+source = "git+https://github.com/servo/rust-mozjs#4d384eb830d8d53c1268e8ce37135ace21e41721"
 dependencies = [
  "heapsize 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1110,7 +1110,7 @@ dependencies = [
 [[package]]
 name = "mozjs_sys"
 version = "0.0.0"
-source = "git+https://github.com/servo/mozjs#e89e72f1d69b6a90a7b691fec2e4624e6a375824"
+source = "git+https://github.com/servo/mozjs#9cd5629500dec858956d39c757954782671f3052"
 dependencies = [
  "libc 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "libz-sys 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/ports/cef/Cargo.lock b/ports/cef/Cargo.lock
index 6bc547973ba..0a327c39b8a 100644
--- a/ports/cef/Cargo.lock
+++ b/ports/cef/Cargo.lock
@@ -847,7 +847,7 @@ dependencies = [
 [[package]]
 name = "js"
 version = "0.1.1"
-source = "git+https://github.com/servo/rust-mozjs#07523d8b3dd12276eb94a266e83c0b1d77aa4160"
+source = "git+https://github.com/servo/rust-mozjs#4d384eb830d8d53c1268e8ce37135ace21e41721"
 dependencies = [
  "heapsize 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1068,7 +1068,7 @@ dependencies = [
 [[package]]
 name = "mozjs_sys"
 version = "0.0.0"
-source = "git+https://github.com/servo/mozjs#e89e72f1d69b6a90a7b691fec2e4624e6a375824"
+source = "git+https://github.com/servo/mozjs#9cd5629500dec858956d39c757954782671f3052"
 dependencies = [
  "libc 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "libz-sys 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/ports/gonk/Cargo.lock b/ports/gonk/Cargo.lock
index 448dc229598..b7056fc08e6 100644
--- a/ports/gonk/Cargo.lock
+++ b/ports/gonk/Cargo.lock
@@ -815,7 +815,7 @@ dependencies = [
 [[package]]
 name = "js"
 version = "0.1.1"
-source = "git+https://github.com/servo/rust-mozjs#07523d8b3dd12276eb94a266e83c0b1d77aa4160"
+source = "git+https://github.com/servo/rust-mozjs#4d384eb830d8d53c1268e8ce37135ace21e41721"
 dependencies = [
  "heapsize 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1036,7 +1036,7 @@ dependencies = [
 [[package]]
 name = "mozjs_sys"
 version = "0.0.0"
-source = "git+https://github.com/servo/mozjs#e89e72f1d69b6a90a7b691fec2e4624e6a375824"
+source = "git+https://github.com/servo/mozjs#9cd5629500dec858956d39c757954782671f3052"
 dependencies = [
  "libc 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "libz-sys 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",