diff --git a/sys/conf/kern.pre.mk b/sys/conf/kern.pre.mk
index 6ad9d209c70a..e6e42b33a9b7 100644
--- a/sys/conf/kern.pre.mk
+++ b/sys/conf/kern.pre.mk
@@ -93,6 +93,7 @@ ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${CFLAGS} ${ASM_CFLAGS.${.IMPSRC:T}}
 COMPAT_FREEBSD32_ENABLED!= grep COMPAT_FREEBSD32 opt_global.h || true ; echo
 
 KASAN_ENABLED!=	grep KASAN opt_global.h || true ; echo
+KCSAN_ENABLED!= grep KCSAN opt_global.h || true ; echo
 KMSAN_ENABLED!= grep KMSAN opt_global.h || true ; echo
 KUBSAN_ENABLED!=	grep KUBSAN opt_global.h || true ; echo
 COVERAGE_ENABLED!=	grep COVERAGE opt_global.h || true ; echo