--- a/browser/config/tooltool-manifests/linux64/fuzzing.manifest
+++ b/browser/config/tooltool-manifests/linux64/fuzzing.manifest
@@ -1,19 +1,10 @@
 [
   {
-    "version": "clang 4.0.1 gecko build for linux",
-    "size": 215309284,
-    "visibility": "public",
-    "digest": "8f6d386ca1d4606526dd24f366b1dbc1914c6c6d7f54c69c2a2ca0e7cfabe641c1168952d606295feffa9f38ad687084de5efb1e80be3ed2f431ac91de80039b",
-    "algorithm": "sha512",
-    "filename": "clang.tar.xz",
-    "unpack": true
-  },
-  {
     "version": "rustc 1.19.0 (0ade33941 2017-07-17) repack",
     "size": 161014632,
     "digest": "65bebcf94fc66ea618c58c9ac33f0f206095ecfe3931cc6edb301f4b40480e3b44b0f39aea7a25fed8eef47e63523e7e670082947a3662cdc04c68ebbe5dfc89",
     "algorithm": "sha512",
     "filename": "rustc.tar.xz",
     "unpack": true
   },
   {

--- a/taskcluster/ci/build/linux.yml
+++ b/taskcluster/ci/build/linux.yml
@@ -416,16 +416,17 @@ linux64-asan-fuzzing/opt:
             - builds/releng_base_linux_64_builds.py
             - balrog/production.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         custom-build-variant-cfg: fuzzing-asan-tc
         tooltool-downloads: public
         need-xvfb: true
     toolchains:
+        - linux64-clang-4
         - linux64-gcc
         - linux64-sccache
 
 linux64-asan/debug:
     description: "Linux64 Debug ASAN"
     index:
         product: firefox
         job-name: linux64-asan-debug