diff --git a/mail-client/thunderbird/thunderbird-60.9.0.ebuild b/mail-client/thunderbird/thunderbird-60.9.0.ebuild
index ac0b9acef568d..23f57c4db64f5 100644
--- a/mail-client/thunderbird/thunderbird-60.9.0.ebuild
+++ b/mail-client/thunderbird/thunderbird-60.9.0.ebuild
@@ -32,7 +32,7 @@ if [[ ${MOZ_ESR} == 1 ]]; then
 fi
 MOZ_P="${PN}-${MOZ_PV}"
 
-LLVM_MAX_SLOT=8
+LLVM_MAX_SLOT=9
 
 inherit check-reqs flag-o-matic toolchain-funcs gnome2-utils llvm mozcoreconf-v6 pax-utils xdg-utils autotools mozlinguas-v2 multiprocessing
 
@@ -117,6 +117,14 @@ DEPEND="${CDEPEND}
 	>=sys-devel/binutils-2.30
 	sys-apps/findutils
 	|| (
+		(
+			sys-devel/clang:9
+			!clang? ( sys-devel/llvm:9 )
+			clang? (
+				=sys-devel/lld-9*
+				sys-devel/llvm:9[gold]
+			)
+		)
 		(
 			sys-devel/clang:8
 			!clang? ( sys-devel/llvm:8 )