diff --git a/quectel_cm_5G/src/device.c b/quectel_cm_5G/src/device.c
index ecf3c68..db2c7e0 100644
--- a/quectel_cm_5G/src/device.c
+++ b/quectel_cm_5G/src/device.c
@@ -445,11 +445,11 @@ int mhidevice_detect(char *qmichannel, char *usbnet_adapter, PROFILE_T *profile)
             }
 
             // 解决硬编码导致不兼容hv问题
-            snprintf(path, sizeof(path), "%s/%s_IPCR", rootdir, d_name);
+            snprintf(path, sizeof(path), "%s/%s_IPCR", rootdir, ent->d_name);
             if (access(path, F_OK)) {
-                snprintf(path, sizeof(path), "%s/%s_QMI0", rootdir, d_name);
+                snprintf(path, sizeof(path), "%s/%s_QMI0", rootdir, ent->d_name);
                 if (access(path, F_OK)) {
-                    snprintf(path, sizeof(path), "%s/%s_MBIM", rootdir, d_name);
+                    snprintf(path, sizeof(path), "%s/%s_MBIM", rootdir, ent->d_name);
                     if (!access(path, F_OK))
                         software_interface = SOFTWARE_MBIM;
                 }