diff --git a/.appveyor.yml b/.appveyor.yml
index dd760320..81bc6891 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -79,7 +79,7 @@ before_test:
   # Fix undefined references to __acrt_iob_func()
   - sed -rie "s/#define std([[:alpha:]]+)[[:space:]]+\(__acrt_iob_func\(([[:digit:]]+)\)\)/#define std\1 (\&__iob_func()[\2])/" "C:\msys64\mingw64\x86_64-w64-mingw32\include\stdio.h"
   - sed -rie "s/#define std([[:alpha:]]+)[[:space:]]+\(__acrt_iob_func\(([[:digit:]]+)\)\)/#define std\1 (\&__iob_func()[\2])/" "C:\msys64\mingw32\i686-w64-mingw32\include\stdio.h"
-  - rustup component add rust-src
+  - rustup component add rust-src llvm-tools-preview
   - set RUST_BACKTRACE=1
   - if not exist %USERPROFILE%\.cargo\bin\cargo-install-latest.exe cargo install cargo-install-latest
   - cargo install-latest cargo-xbuild bootimage
diff --git a/.travis.yml b/.travis.yml
index 6395333a..37dc8b75 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -41,7 +41,7 @@ install:
   - if [ $TRAVIS_OS_NAME = windows ]; then choco install qemu; export PATH="/c/Program Files/qemu:$PATH"; fi
 
 before_script:
-  - rustup component add rust-src
+  - rustup component add rust-src llvm-tools-preview
   - (test -x $HOME/.cargo/bin/cargo-install-latest || cargo install cargo-install-latest)
   - cargo install-latest cargo-xbuild bootimage cargo-cache