diff --git a/src/packet_io/pcap_file_mode/pio_pcap_file.cpp b/src/packet_io/pcap_file_mode/pio_pcap_file.cpp
index 7fec9a4..a882fcc 100644
--- a/src/packet_io/pcap_file_mode/pio_pcap_file.cpp
+++ b/src/packet_io/pcap_file_mode/pio_pcap_file.cpp
@@ -82,7 +82,6 @@ static ssize_t init_pcap_file(struct pcap_plain_file_info *pfile_info)
     }
 
     pthread_mutex_init(&pfile_info->handle_mutex, nullptr);
-#if 0
     if (pfile_info->shared != nullptr && pfile_info->shared->bpf_string != nullptr) {
         if (pcap_compile(pfile_info->pcap_handle, &pfile_info->filter, 
                          pfile_info->shared->bpf_string, 1, 0) < 0) {
@@ -99,7 +98,7 @@ static ssize_t init_pcap_file(struct pcap_plain_file_info *pfile_info)
         }
         pcap_freecode(&pfile_info->filter);
     }
-#endif
+
     pfile_info->data_link = pcap_datalink(pfile_info->pcap_handle);
 
     return 0;
@@ -169,6 +168,9 @@ static ssize_t pcap_directory_file_init(struct pio_pcap_file_device_context *pfi
     TAILQ_INIT(&g_pending_file_queue.file_queue_head);
     pthread_mutex_init(&g_pending_file_queue.queue_mutex, nullptr);
 
+    /* pcap file device context mutex init */
+    pthread_mutex_init(&pfile_dev_ctx->ctx_mutex, nullptr);
+
     return 0;
 }
 
@@ -792,7 +794,11 @@ static ssize_t pcap_directory_files_dispatch(struct pio_pcap_file_device_context
 
         pfile_info->shared = &pfile_dev_ctx->shared;
 
-        if (init_pcap_file(pfile_info) < 0) {
+        /* init_pcap_file is thread unsafe, because it calls pcap_compile(thread unsafe) */
+        pthread_mutex_lock(&pfile_dev_ctx->ctx_mutex);
+        res = init_pcap_file(pfile_info);
+        pthread_mutex_unlock(&pfile_dev_ctx->ctx_mutex);
+        if (res < 0) {
             FREE(pfile_info);
             FREE(pfile_dev_ctx->entity.dir->pending_file[rxq_id]);
             log_error(ST_ERR_PIO_PCAP_FILE_DEVICE, "init_pcap_file failed.");
diff --git a/src/packet_io/pcap_file_mode/pio_pcap_file.h b/src/packet_io/pcap_file_mode/pio_pcap_file.h
index 24641e4..55e1854 100644
--- a/src/packet_io/pcap_file_mode/pio_pcap_file.h
+++ b/src/packet_io/pcap_file_mode/pio_pcap_file.h
@@ -99,6 +99,8 @@ struct pio_pcap_file_device_context {
 
     /* point to packet_io device it belongs to */
     struct packet_io_device *pdev;
+
+    pthread_mutex_t ctx_mutex;
 };
 
 /**