diff --git a/hw/block-common.h b/hw/block-common.h
index bba817a..2f65186 100644
--- a/hw/block-common.h
+++ b/hw/block-common.h
@@ -16,7 +16,7 @@
 /* Hard disk geometry */
 
 void hd_geometry_guess(BlockDriverState *bs,
-                       int *pcyls, int *pheads, int *psecs,
+                       uint32_t *pcyls, uint32_t *pheads, uint32_t *psecs,
                        int *ptrans);
 
 #endif
diff --git a/hw/hd-geometry.c b/hw/hd-geometry.c
index 4d746b7..7626cbb 100644
--- a/hw/hd-geometry.c
+++ b/hw/hd-geometry.c
@@ -98,7 +98,7 @@
 }
 
 static void guess_chs_for_size(BlockDriverState *bs,
-                               int *pcyls, int *pheads, int *psecs)
+                uint32_t *pcyls, uint32_t *pheads, uint32_t *psecs)
 {
     uint64_t nb_sectors;
     int cylinders;
@@ -117,7 +117,7 @@
 }
 
 void hd_geometry_guess(BlockDriverState *bs,
-                       int *pcyls, int *pheads, int *psecs,
+                       uint32_t *pcyls, uint32_t *pheads, uint32_t *psecs,
                        int *ptrans)
 {
     int cylinders, heads, secs, translation;
diff --git a/hw/ide/core.c b/hw/ide/core.c
index 7f5ad07..f1966e3 100644
--- a/hw/ide/core.c
+++ b/hw/ide/core.c
@@ -1927,7 +1927,7 @@
                    const char *version, const char *serial, const char *model,
                    uint64_t wwn)
 {
-    int cylinders, heads, secs;
+    uint32_t cylinders, heads, secs;
     uint64_t nb_sectors;
 
     s->bs = bs;
diff --git a/hw/scsi-disk.c b/hw/scsi-disk.c
index fc077f5..c881acf 100644
--- a/hw/scsi-disk.c
+++ b/hw/scsi-disk.c
@@ -968,7 +968,7 @@
     };
 
     BlockDriverState *bdrv = s->qdev.conf.bs;
-    int cylinders, heads, secs;
+    uint32_t cylinders, heads, secs;
     uint8_t *p = *p_outbuf;
 
     if ((mode_sense_valid[page] & (1 << s->qdev.type)) == 0) {
diff --git a/hw/virtio-blk.c b/hw/virtio-blk.c
index d2709a7..4344e28 100644
--- a/hw/virtio-blk.c
+++ b/hw/virtio-blk.c
@@ -590,7 +590,7 @@
 VirtIODevice *virtio_blk_init(DeviceState *dev, VirtIOBlkConf *blk)
 {
     VirtIOBlock *s;
-    int cylinders, heads, secs;
+    uint32_t cylinders, heads, secs;
     static int virtio_blk_id;
     DriveInfo *dinfo;
 
diff --git a/trace-events b/trace-events
index 5f27f1a..8b1fb24 100644
--- a/trace-events
+++ b/trace-events
@@ -143,7 +143,7 @@
 
 # hw/hd-geometry.c
 hd_geometry_lchs_guess(void *bs, int cyls, int heads, int secs) "bs %p LCHS %d %d %d"
-hd_geometry_guess(void *bs, int cyls, int heads, int secs, int trans) "bs %p CHS %d %d %d trans %d"
+hd_geometry_guess(void *bs, uint32_t cyls, uint32_t heads, uint32_t secs, int trans) "bs %p CHS %u %u %u trans %d"
 
 # hw/jazz-led.c
 jazz_led_read(uint64_t addr, uint8_t val) "read addr=0x%"PRIx64": 0x%x"