diff --git a/hw/display/qxl.c b/hw/display/qxl.c
index 46cc86690c26..0e2682d28b2d 100644
--- a/hw/display/qxl.c
+++ b/hw/display/qxl.c
@@ -1816,16 +1816,17 @@ static void qxl_hw_update(void *opaque)
 static void qxl_dirty_one_surface(PCIQXLDevice *qxl, QXLPHYSICAL pqxl,
                                   uint32_t height, int32_t stride)
 {
-    uint64_t offset;
-    uint32_t slot, size;
+    uint64_t offset, size;
+    uint32_t slot;
     bool rc;
 
     rc = qxl_get_check_slot_offset(qxl, pqxl, &slot, &offset);
     assert(rc == true);
-    size = height * abs(stride);
-    trace_qxl_surfaces_dirty(qxl->id, (int)offset, size);
+    size = (uint64_t)height * abs(stride);
+    trace_qxl_surfaces_dirty(qxl->id, offset, size);
     qxl_set_dirty(qxl->guest_slots[slot].mr,
-                  qxl->guest_slots[slot].offset + offset, size);
+                  qxl->guest_slots[slot].offset + offset,
+                  qxl->guest_slots[slot].offset + offset + size);
 }
 
 static void qxl_dirty_surfaces(PCIQXLDevice *qxl)
diff --git a/hw/display/trace-events b/hw/display/trace-events
index 9dd82cecdec6..78f04657a0c5 100644
--- a/hw/display/trace-events
+++ b/hw/display/trace-events
@@ -105,7 +105,7 @@ qxl_spice_reset_image_cache(int qid) "%d"
 qxl_spice_reset_memslots(int qid) "%d"
 qxl_spice_update_area(int qid, uint32_t surface_id, uint32_t left, uint32_t right, uint32_t top, uint32_t bottom) "%d sid=%d [%d,%d,%d,%d]"
 qxl_spice_update_area_rest(int qid, uint32_t num_dirty_rects, uint32_t clear_dirty_region) "%d #d=%d clear=%d"
-qxl_surfaces_dirty(int qid, int offset, int size) "%d offset=%d size=%d"
+qxl_surfaces_dirty(int qid, uint64_t offset, uint64_t size) "%d offset=0x%"PRIx64" size=0x%"PRIx64
 qxl_send_events(int qid, uint32_t events) "%d %d"
 qxl_send_events_vm_stopped(int qid, uint32_t events) "%d %d"
 qxl_set_guest_bug(int qid) "%d"