diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 4d9fc905dc..5c41fa9f78 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1040,12 +1040,14 @@ unit:clang:tsan:
       artifacts: true
 
 # Jobs for Clang builds on Debian 11 "bullseye" (amd64)
+# The -Wno-compound-token-split-by-macro option prevents warning when compiling
+# Perl DLZ module with Clang against Perl older than version 5.35.2.
 
 clang:bullseye:amd64:
   variables:
     BUILD_CONTRIB: 1
     CC: ${CLANG}
-    CFLAGS: "${CFLAGS_COMMON} -Wenum-conversion"
+    CFLAGS: "${CFLAGS_COMMON} -Wenum-conversion -Wno-compound-token-split-by-macro"
     # See https://gitlab.isc.org/isc-projects/bind9/-/issues/3444
     EXTRA_CONFIGURE: "--without-jemalloc --disable-leak-detection"
     RUN_MAKE_INSTALL: 1