diff --git a/projects/dbus-broker/build.sh b/projects/dbus-broker/build.sh
index f2b1467a7..8aa414162 100755
--- a/projects/dbus-broker/build.sh
+++ b/projects/dbus-broker/build.sh
@@ -46,6 +46,8 @@ if [[ "$SANITIZER" == undefined ]]; then
     UBSAN_FLAGS="-fsanitize=$additional_ubsan_checks -fno-sanitize-recover=$additional_ubsan_checks"
     CFLAGS+=" $UBSAN_FLAGS"
     CXXFLAGS+=" $UBSAN_FLAGS"
+    MESON_CFLAGS+=" $UBSAN_FLAGS"
+    MESON_CXXFLAGS+=" $UBSAN_FLAGS"
 fi
 
 pip3 install meson ninja