diff --git a/utils/conntest/rhd_conntest.c b/utils/conntest/rhd_conntest.c
index e4ca8db..cc7cbb5 100644
--- a/utils/conntest/rhd_conntest.c
+++ b/utils/conntest/rhd_conntest.c
@@ -543,13 +543,15 @@ MapBar(struct pci_dev *device, int ioBar, int devMem)
 {
     void *map;
 
-    if (!device->base_addr[ioBar] || !device->size[ioBar])
+    pci_fill_info(device, PCI_FILL_BASES | PCI_FILL_SIZES);
+    if (!device->base_addr[ioBar])
 	return NULL;
 
-    map = mmap(0, device->size[ioBar], PROT_WRITE | PROT_READ, MAP_SHARED,
-	       devMem, device->base_addr[ioBar]);
-    /* printf("Mapped IO at 0x%08llX (BAR %1d: 0x%08llX)\n",
-       device->base_addr[io_bar], io_bar, device->size[io_bar]); */
+    map = mmap(0, device->size[ioBar] ? device->size[ioBar] : 0x10000,
+	       PROT_WRITE | PROT_READ, MAP_SHARED, devMem,
+	       device->base_addr[ioBar]);
+    /* printf("Mapped IO at 0x%08X (BAR %1d: 0x%08X)\n",
+       device->base_addr[ioBar], ioBar, device->size[ioBar]); */
 
     return map;
 }