diff --git a/src/shared/json.c b/src/shared/json.c
index 420555ae544..75795c28503 100644
--- a/src/shared/json.c
+++ b/src/shared/json.c
@@ -1236,7 +1236,7 @@ int json_variant_get_source(JsonVariant *v, const char **ret_source, unsigned *r
         return 0;
 }
 
-static int print_source(FILE *f, JsonVariant *v, unsigned flags, bool whitespace) {
+static int print_source(FILE *f, JsonVariant *v, JsonFormatFlags flags, bool whitespace) {
         size_t w, k;
 
         if (!FLAGS_SET(flags, JSON_FORMAT_SOURCE|JSON_FORMAT_PRETTY))
@@ -1289,7 +1289,7 @@ static int print_source(FILE *f, JsonVariant *v, unsigned flags, bool whitespace
         return 0;
 }
 
-static int json_format(FILE *f, JsonVariant *v, unsigned flags, const char *prefix) {
+static int json_format(FILE *f, JsonVariant *v, JsonFormatFlags flags, const char *prefix) {
         int r;
 
         assert(f);
@@ -1546,7 +1546,7 @@ static int json_format(FILE *f, JsonVariant *v, unsigned flags, const char *pref
         return 0;
 }
 
-int json_variant_format(JsonVariant *v, unsigned flags, char **ret) {
+int json_variant_format(JsonVariant *v, JsonFormatFlags flags, char **ret) {
         _cleanup_free_ char *s = NULL;
         size_t sz = 0;
         int r;
@@ -1576,7 +1576,7 @@ int json_variant_format(JsonVariant *v, unsigned flags, char **ret) {
         return (int) sz;
 }
 
-void json_variant_dump(JsonVariant *v, unsigned flags, FILE *f, const char *prefix) {
+void json_variant_dump(JsonVariant *v, JsonFormatFlags flags, FILE *f, const char *prefix) {
         if (!v)
                 return;
 
diff --git a/src/shared/json.h b/src/shared/json.h
index 4a21a411acd..04687d41359 100644
--- a/src/shared/json.h
+++ b/src/shared/json.h
@@ -150,17 +150,17 @@ struct json_variant_foreach_state {
 
 int json_variant_get_source(JsonVariant *v, const char **ret_source, unsigned *ret_line, unsigned *ret_column);
 
-enum {
+typedef enum JsonFormatFlags {
         JSON_FORMAT_NEWLINE = 1 << 0, /* suffix with newline */
         JSON_FORMAT_PRETTY  = 1 << 1, /* add internal whitespace to appeal to human readers */
         JSON_FORMAT_COLOR   = 1 << 2, /* insert ANSI color sequences */
         JSON_FORMAT_SOURCE  = 1 << 3, /* prefix with source filename/line/column */
         JSON_FORMAT_SSE     = 1 << 4, /* prefix/suffix with W3C server-sent events */
         JSON_FORMAT_SEQ     = 1 << 5, /* prefix/suffix with RFC 7464 application/json-seq */
-};
+} JsonFormatFlags;
 
-int json_variant_format(JsonVariant *v, unsigned flags, char **ret);
-void json_variant_dump(JsonVariant *v, unsigned flags, FILE *f, const char *prefix);
+int json_variant_format(JsonVariant *v, JsonFormatFlags flags, char **ret);
+void json_variant_dump(JsonVariant *v, JsonFormatFlags flags, FILE *f, const char *prefix);
 
 int json_parse(const char *string, JsonVariant **ret, unsigned *ret_line, unsigned *ret_column);
 int json_parse_continue(const char **p, JsonVariant **ret, unsigned *ret_line, unsigned *ret_column);