diff --git a/ChangeLog b/ChangeLog
index b93141df6..0afcadf68 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2011-03-30  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* grub-core/kern/emu/getroot.c (grub_util_get_grub_dev) [__linux__]:
+	Preserve partition number in mdadm code path.
+
 2011-03-30  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	* grub-core/kern/emu/hostdisk.c (grub_util_biosdisk_get_grub_dev): Add
diff --git a/grub-core/kern/emu/getroot.c b/grub-core/kern/emu/getroot.c
index 1d87442d9..ae066d2f8 100644
--- a/grub-core/kern/emu/getroot.c
+++ b/grub-core/kern/emu/getroot.c
@@ -808,12 +808,30 @@ grub_util_get_grub_dev (const char *os_dev)
 	if (mdadm_name)
 	  {
 	    char *newname;
+	    char *q;
+
+	    for (q = os_dev + strlen (os_dev) - 1; q >= os_dev && isdigit (*q);
+		 q--);
+
+	    if (q >= os_dev && *q == 'p')
+	      {
+		newname = xasprintf ("/dev/md/%sp%s", mdadm_name, q + 1);
+		if (stat (newname, &st) == 0)
+		  {
+		    free (grub_dev);
+		    grub_dev = xasprintf ("md/%s,%s", mdadm_name, q + 1);
+		    goto done;
+		  }
+		free (newname);
+	      }
 	    newname = xasprintf ("/dev/md/%s", mdadm_name);
 	    if (stat (newname, &st) == 0)
 	      {
 		free (grub_dev);
 		grub_dev = xasprintf ("md/%s", mdadm_name);
 	      }
+
+	  done:
 	    free (newname);
 	    free (mdadm_name);
 	  }