diff --git a/app/nvmf_tgt/nvmf_rpc.c b/app/nvmf_tgt/nvmf_rpc.c
index 7209cc046..cd62ca5eb 100644
--- a/app/nvmf_tgt/nvmf_rpc.c
+++ b/app/nvmf_tgt/nvmf_rpc.c
@@ -98,22 +98,17 @@ dump_nvmf_subsystem(struct spdk_json_write_ctx *w, struct spdk_nvmf_subsystem *s
 
 	if (subsystem->subtype == SPDK_NVMF_SUBTYPE_NVME) {
 		if (subsystem->mode == NVMF_SUBSYSTEM_MODE_DIRECT) {
+			char pci_str[20];
 			struct spdk_pci_device *dev = subsystem->dev.direct.pci_dev;
-			uint16_t found_domain = spdk_pci_device_get_domain(dev);
-			uint8_t found_bus	 = spdk_pci_device_get_bus(dev);
-			uint8_t found_dev	 = spdk_pci_device_get_dev(dev);
-			uint8_t found_func	 = spdk_pci_device_get_func(dev);
+
+			snprintf(pci_str, sizeof(pci_str), "%04x:%02x:%02x.%x",
+				 spdk_pci_device_get_domain(dev),
+				 spdk_pci_device_get_bus(dev),
+				 spdk_pci_device_get_dev(dev),
+				 spdk_pci_device_get_func(dev));
+
 			spdk_json_write_name(w, "pci_address");
-			spdk_json_write_object_begin(w);
-			spdk_json_write_name(w, "domain");
-			spdk_json_write_int32(w, found_domain);
-			spdk_json_write_name(w, "bus");
-			spdk_json_write_int32(w, found_bus);
-			spdk_json_write_name(w, "device");
-			spdk_json_write_int32(w, found_dev);
-			spdk_json_write_name(w, "function");
-			spdk_json_write_int32(w, found_func);
-			spdk_json_write_object_end(w);
+			spdk_json_write_string(w, pci_str);
 		} else {
 			int i;
 			spdk_json_write_name(w, "serial_number");