diff --git a/Project/applications/smartcities/json.c b/Project/applications/smartcities/json.c
index 2564b95..6f091fd 100644
--- a/Project/applications/smartcities/json.c
+++ b/Project/applications/smartcities/json.c
@@ -34,7 +34,7 @@ char* prepare_json_register_statement(char* module_ID, uint8_t sensor_type)
 		str_aux = join_strings(str_aux,str_aux2,length,observation_length,JOIN_FREE_MEM);
 		length += observation_length;
 	}
-	length--; //REMOVE LAST ','
+	length--;
 	json_statement = join_strings(str_aux,"]}",length,2,JOIN_NO_FREE);
 	chHeapFree(str_aux);
 	return json_statement;