diff --git a/include/mtcr_ul/mtcr_com_defs.h b/include/mtcr_ul/mtcr_com_defs.h
index 6c147d84..7b4020bf 100644
--- a/include/mtcr_ul/mtcr_com_defs.h
+++ b/include/mtcr_ul/mtcr_com_defs.h
@@ -335,7 +335,7 @@ typedef enum
 typedef struct vf_info_t
 {
     char dev_name[512];
-    u_int16_t domain;
+    u_int32_t domain;
     u_int8_t bus;
     u_int8_t dev;
     u_int8_t func;
@@ -353,7 +353,7 @@ typedef struct dev_info_t
     {
         struct
         {
-            u_int16_t domain;
+            u_int32_t domain;
             u_int8_t bus;
             u_int8_t dev;
             u_int8_t func;
diff --git a/mlxconfig/mlxcfg_ui.cpp b/mlxconfig/mlxcfg_ui.cpp
index 15af7240..955ec11a 100644
--- a/mlxconfig/mlxcfg_ui.cpp
+++ b/mlxconfig/mlxcfg_ui.cpp
@@ -257,9 +257,9 @@ mlxCfgStatus MlxCfg::queryDevsCfg()
             mdevices_info_destroy(dev, numOfDev);
             return err(true, NO_DEV_ERR);
         }
-        // printf("-D- num of dev: %d , 1st dev : %s\n", numOfDev, buf);
+        // printf("-D- num of dev: %d , 1st dev : %s\n", numOfDev, dev->dev_name);
         dev_info* devPtr = dev;
-        char pcibuf[32] = {0};
+        char pcibuf[64] = {0};
 
         for (int i = 0; i < numOfDev; i++)
         {
@@ -268,7 +268,7 @@ mlxCfgStatus MlxCfg::queryDevsCfg()
 #else
             const char* device_name_ptrn = "%04x:%02x:%02x.%x";
 #endif
-            snprintf(pcibuf, 32, device_name_ptrn, devPtr->pci.domain, devPtr->pci.bus, devPtr->pci.dev,
+            snprintf(pcibuf, 64, device_name_ptrn, devPtr->pci.domain, devPtr->pci.bus, devPtr->pci.dev,
                      devPtr->pci.func);
             if (queryDevCfg(devPtr->pci.conf_dev, pcibuf, i + 1))
             {
diff --git a/mtcr_ul/mtcr_ul_com.c b/mtcr_ul/mtcr_ul_com.c
index bc0c0d7e..e43bbac5 100644
--- a/mtcr_ul/mtcr_ul_com.c
+++ b/mtcr_ul/mtcr_ul_com.c
@@ -203,11 +203,11 @@ static int _extract_dbdf_from_full_name(const char* name,
                                         unsigned  * dev,
                                         unsigned  * func)
 {
-    if (sscanf(name, "/sys/bus/pci/devices/%4x:%2x:%2x.%d/resource0", domain, bus, dev, func) == 4) {
+    if (sscanf(name, "/sys/bus/pci/devices/%x:%2x:%2x.%d/resource0", domain, bus, dev, func) == 4) {
         return 0;
-    } else if (sscanf(name, "/sys/bus/pci/devices/%4x:%2x:%2x.%d/config", domain, bus, dev, func) == 4) {
+    } else if (sscanf(name, "/sys/bus/pci/devices/%x:%2x:%2x.%d/config", domain, bus, dev, func) == 4) {
         return 0;
-    } else if (sscanf(name, "/proc/bus/pci/%4x:%2x/%2x.%d", domain, bus, dev, func) == 4) {
+    } else if (sscanf(name, "/proc/bus/pci/%x:%2x/%2x.%d", domain, bus, dev, func) == 4) {
         return 0;
     } else if (sscanf(name, "/proc/bus/pci/%2x/%2x.%d", bus, dev, func) == 3) {
         *domain = 0;