diff --git a/compiler-builtins/Cargo.toml b/compiler-builtins/Cargo.toml
index c5446cd7..3ccb05f7 100644
--- a/compiler-builtins/Cargo.toml
+++ b/compiler-builtins/Cargo.toml
@@ -19,6 +19,8 @@ links = "compiler-rt"
 bench = false
 doctest = false
 test = false
+# make sure this crate isn't included in public standard library docs
+doc = false
 
 [dependencies]
 core = { path = "../../core", optional = true }
diff --git a/rust-version b/rust-version
index 73183983..3f10132b 100644
--- a/rust-version
+++ b/rust-version
@@ -1 +1 @@
-d087f112b7d1323446c7b39a8b616aee7fa56b3d
+fd2eb391d032181459773f3498c17b198513e0d0