diff --git a/hw/device-assignment.c b/hw/device-assignment.c
index c99d986..4af9ff6 100644
--- a/hw/device-assignment.c
+++ b/hw/device-assignment.c
@@ -47,7 +47,7 @@
 #define IORESOURCE_DMA      0x00000800
 #define IORESOURCE_PREFETCH 0x00001000  /* No side effects */
 
-/* #define DEVICE_ASSIGNMENT_DEBUG 1 */
+#define DEVICE_ASSIGNMENT_DEBUG 1
 
 #ifdef DEVICE_ASSIGNMENT_DEBUG
 #define DEBUG(fmt, ...)                                       \
@@ -267,10 +267,10 @@ static void assigned_dev_iomem_map(PCIDevice *pci_dev, int region_num,
     pcibus_t old_esize = region->e_size;
     int first_map = (region->e_size == 0);
     int ret = 0;
-
+#if 0
     DEBUG("e_phys=%08x r_virt=%p type=%d len=%08x region_num=%d \n",
           e_phys, region->u.r_virtbase, type, e_size, region_num);
-
+#endif
     region->e_physbase = e_phys;
     region->e_size = e_size;
 
@@ -344,10 +344,10 @@ static void assigned_dev_ioport_map(PCIDevice *pci_dev, int region_num,
 
     region->e_physbase = addr;
     region->e_size = size;
-
+#if 0
     DEBUG("e_phys=0x%x r_baseport=%x type=0x%x len=%d region_num=%d \n",
           addr, region->u.r_baseport, type, size, region_num);
-
+#endif
     if (first_map && region->region->resource_fd < 0) {
 	struct ioperm_data *data;
 
@@ -561,11 +561,13 @@ static int assigned_dev_register_regions(PCIRegion *io_regions,
                 : PCI_BASE_ADDRESS_SPACE_MEMORY;
 
             if (cur_region->size & 0xFFF) {
+#if 0
                 fprintf(stderr, "PCI region %d at address 0x%llx "
                         "has size 0x%x, which is not a multiple of 4K. "
                         "You might experience some performance hit due to that.\n",
                         i, (unsigned long long)cur_region->base_addr,
                         cur_region->size);
+#endif
                 slow_map = 1;
             }
 
@@ -1341,8 +1343,8 @@ static void msix_mmio_writel(void *opaque,
     unsigned int offset = addr & 0xfff;
     void *page = adev->msix_table_page;
 
-    DEBUG("write to MSI-X entry table mmio offset 0x%lx, val 0x%lx\n",
-		    addr, val);
+    DEBUG("write to MSI-X entry table mmio offset 0x%lx, val 0x%ux\n",
+		    (unsigned long)addr, val);
     memcpy((void *)((char *)page + offset), &val, 4);
 }