diff --git a/.gitmodules b/.gitmodules
index 2802c8d63913f..901b9d7e789ce 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -32,7 +32,7 @@
 	url = https://github.com/rust-lang-nursery/rls.git
 [submodule "src/libcompiler_builtins"]
 	path = src/libcompiler_builtins
-	url = https://github.com/rust-lang-nursery/compiler-builtins
+	url = https://github.com/ishitatsuyuki/compiler-builtins.git
 [submodule "src/tools/clippy"]
 	path = src/tools/clippy
 	url = https://github.com/rust-lang-nursery/rust-clippy.git
diff --git a/src/libcompiler_builtins b/src/libcompiler_builtins
index 0b9844764ea1f..b992f3ebac9bc 160000
--- a/src/libcompiler_builtins
+++ b/src/libcompiler_builtins
@@ -1 +1 @@
-Subproject commit 0b9844764ea1f99ea11a7917a4f3ba7fd2db775c
+Subproject commit b992f3ebac9bc975fb6fcc933364360a3dff3c2f