diff --git a/src/shared/specifier.c b/src/shared/specifier.c
index a49b16b736..d54ab9f5a9 100644
--- a/src/shared/specifier.c
+++ b/src/shared/specifier.c
@@ -175,6 +175,12 @@ int specifier_uuid(char specifier, const void *data, const char *root, const voi
         return 0;
 }
 
+int specifier_uint64(char specifier, const void *data, const char *root, const void *userdata, char **ret) {
+        const uint64_t *n = ASSERT_PTR(data);
+
+        return asprintf(ret, "%" PRIu64, *n) < 0 ? -ENOMEM : 0;
+}
+
 int specifier_machine_id(char specifier, const void *data, const char *root, const void *userdata, char **ret) {
         sd_id128_t id;
         int r;
diff --git a/src/shared/specifier.h b/src/shared/specifier.h
index a245e546e0..df72bdc39b 100644
--- a/src/shared/specifier.h
+++ b/src/shared/specifier.h
@@ -18,6 +18,7 @@ int specifier_real_path(char specifier, const void *data, const char *root, cons
 int specifier_real_directory(char specifier, const void *data, const char *root, const void *userdata, char **ret);
 int specifier_id128(char specifier, const void *data, const char *root, const void *userdata, char **ret);
 int specifier_uuid(char specifier, const void *data, const char *root, const void *userdata, char **ret);
+int specifier_uint64(char specifier, const void *data, const char *root, const void *userdata, char **ret);
 
 int specifier_machine_id(char specifier, const void *data, const char *root, const void *userdata, char **ret);
 int specifier_boot_id(char specifier, const void *data, const char *root, const void *userdata, char **ret);