diff --git a/src/libsystemd/sd-json/json-util.h b/src/libsystemd/sd-json/json-util.h
index a3967cdeb5..baccfa4d91 100644
--- a/src/libsystemd/sd-json/json-util.h
+++ b/src/libsystemd/sd-json/json-util.h
@@ -248,6 +248,7 @@ enum {
 #define JSON_BUILD_PAIR_TRISTATE(name, i) SD_JSON_BUILD_PAIR(name, JSON_BUILD_TRISTATE(i))
 #define JSON_BUILD_PAIR_PIDREF(name, p) SD_JSON_BUILD_PAIR(name, JSON_BUILD_PIDREF(p))
 #define JSON_BUILD_PAIR_DEVNUM(name, d) SD_JSON_BUILD_PAIR(name, JSON_BUILD_DEVNUM(d))
+#define JSON_BUILD_PAIR_YES_NO(name, b) SD_JSON_BUILD_PAIR(name, SD_JSON_BUILD_STRING(yes_no(b)))
 
 #define JSON_BUILD_PAIR_CONDITION_UNSIGNED(condition, name, value) \
         SD_JSON_BUILD_PAIR_CONDITION(condition, name, SD_JSON_BUILD_UNSIGNED(value))