diff --git a/profiles/package.mask b/profiles/package.mask
index 04fc29ead3965..6681e0d3bd4de 100644
--- a/profiles/package.mask
+++ b/profiles/package.mask
@@ -71,6 +71,7 @@ app-crypt/hashcat-gui
 # media-libs/mesa release supports it.
 ~sys-devel/clang-3.9.0
 ~sys-devel/llvm-3.9.0
+~sys-libs/llvm-libunwind-3.9.0
 
 # Lars Wendler <polynomial-c@gentoo.org> (26 Aug 2016)
 # Masked while being tested and reverse deps aren't fully compatible