diff --git a/contrib/libvhost-user/libvhost-user.c b/contrib/libvhost-user/libvhost-user.c
index 0ffa0f45c8..c56f2dfe44 100644
--- a/contrib/libvhost-user/libvhost-user.c
+++ b/contrib/libvhost-user/libvhost-user.c
@@ -663,8 +663,10 @@ vu_set_mem_table_exec_postcopy(VuDev *dev, VhostUserMsg *vmsg)
                      __func__, i);
             return false;
         }
-        DPRINT("%s: region %d: Registered userfault for %llx + %llx\n",
-                __func__, i, reg_struct.range.start, reg_struct.range.len);
+        DPRINT("%s: region %d: Registered userfault for %"
+               PRIx64 " + %" PRIx64 "\n", __func__, i,
+               (uint64_t)reg_struct.range.start,
+               (uint64_t)reg_struct.range.len);
         /* Now it's registered we can let the client at it */
         if (mprotect((void *)(uintptr_t)dev_region->mmap_addr,
                      dev_region->size + dev_region->mmap_offset,