diff --git a/src/fuzz/fuzz-bootspec.c b/src/fuzz/fuzz-bootspec.c
index b59e67c24e3..fa9e3f06e04 100644
--- a/src/fuzz/fuzz-bootspec.c
+++ b/src/fuzz/fuzz-bootspec.c
@@ -84,6 +84,9 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
         _cleanup_(boot_config_free) BootConfig config = BOOT_CONFIG_NULL;
         int r;
 
+        if (size > 65535)
+                return 0;
+
         /* Disable most logging if not running standalone */
         if (!getenv("SYSTEMD_LOG_LEVEL"))
                 log_set_max_level(LOG_CRIT);
diff --git a/src/fuzz/fuzz-bootspec.options b/src/fuzz/fuzz-bootspec.options
new file mode 100644
index 00000000000..0824b19fab4
--- /dev/null
+++ b/src/fuzz/fuzz-bootspec.options
@@ -0,0 +1,2 @@
+[libfuzzer]
+max_len = 65535