diff --git a/fuzzing/broker/broker_fuzz_test_config.cpp b/fuzzing/broker/broker_fuzz_test_config.cpp
index c8ea405f95..baa7182940 100644
--- a/fuzzing/broker/broker_fuzz_test_config.cpp
+++ b/fuzzing/broker/broker_fuzz_test_config.cpp
@@ -23,6 +23,8 @@ SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
 #include <sys/stat.h>
 #include <unistd.h>
 
+#include "broker_fuzz.h"
+
 /*
  * Broker check of config only, the config isn't used
  */
@@ -55,6 +57,10 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
 	char filename[100];
 	FILE *fptr;
 
+	if(size < kMinInputLength){
+		return 0;
+	}
+
 	umask(0077);
 
 	snprintf(filename, sizeof(filename), "/tmp/mosquitto_%d.conf", getpid());