diff --git a/hw/ide/core.c b/hw/ide/core.c
index 1ca7cdf..58a454f 100644
--- a/hw/ide/core.c
+++ b/hw/ide/core.c
@@ -1935,16 +1935,16 @@
     s->drive_kind = kind;
 
     bdrv_get_geometry(bs, &nb_sectors);
-    if (cylinders < 1 || cylinders > 16383) {
-        error_report("cyls must be between 1 and 16383");
+    if (cylinders < 1 || cylinders > 65535) {
+        error_report("cyls must be between 1 and 65535");
         return -1;
     }
     if (heads < 1 || heads > 16) {
         error_report("heads must be between 1 and 16");
         return -1;
     }
-    if (secs < 1 || secs > 63) {
-        error_report("secs must be between 1 and 63");
+    if (secs < 1 || secs > 255) {
+        error_report("secs must be between 1 and 255");
         return -1;
     }
     s->cylinders = cylinders;