diff --git a/thunderbird.spec b/thunderbird.spec
index a04b686..c7d08cc 100644
--- a/thunderbird.spec
+++ b/thunderbird.spec
@@ -648,7 +648,7 @@ echo "use_rustts            %{?use_rustts}"
 %patch424 -p1 -b .svg-rendering
 %patch425 -p1 -b .D158770.diff
 
-%if 0%{?fedora} >= 38 || (0%{?rhel} == 9 && %{rhel9_minor_version} >= 3)
+%if 0%{?fedora} >= 38 || (0%{?rhel} == 9 && %{rhel9_minor_version} >= 3) || (0%{?rhel} == 8 && %{rhel8_minor_version} >= 9)
 # MUST ONLY be applied for building against clang LLVM 16.
 # Would crash with earlier clang.
 %patch -P 427 -p1 -b .rust-bindgen-2319-2339