diff --git a/.appveyor.yml b/.appveyor.yml
index d93a4b30..f60135e9 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -67,7 +67,7 @@ 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 005c2653..3f7808d5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -29,7 +29,7 @@ cache:
     - $HOME/.cargo
 
 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