diff --git a/convert/source-ext2.c b/convert/source-ext2.c
index cdaf6698..f1075da5 100644
--- a/convert/source-ext2.c
+++ b/convert/source-ext2.c
@@ -638,21 +638,12 @@ out:
 		free(ext2_inode);
 	return ret;
 }
-#define MINORBITS	20
-#define MKDEV(ma, mi)	(((ma) << MINORBITS) | (mi))
 
 static inline dev_t old_decode_dev(u16 val)
 {
 	return MKDEV((val >> 8) & 255, val & 255);
 }
 
-static inline dev_t new_decode_dev(u32 dev)
-{
-	unsigned major = (dev & 0xfff00) >> 8;
-	unsigned minor = (dev & 0xff) | ((dev >> 12) & 0xfff00);
-	return MKDEV(major, minor);
-}
-
 static void ext2_copy_inode_item(struct btrfs_inode_item *dst,
 			   struct ext2_inode *src, u32 blocksize)
 {
@@ -692,7 +683,7 @@ static void ext2_copy_inode_item(struct btrfs_inode_item *dst,
 				old_decode_dev(src->i_block[0]));
 		} else {
 			btrfs_set_stack_inode_rdev(dst,
-				new_decode_dev(src->i_block[1]));
+				decode_dev(src->i_block[1]));
 		}
 	}
 	memset(&dst->reserved, 0, sizeof(dst->reserved));
diff --git a/convert/source-fs.c b/convert/source-fs.c
index d6dfc077..b6d08370 100644
--- a/convert/source-fs.c
+++ b/convert/source-fs.c
@@ -28,6 +28,14 @@ const struct simple_range btrfs_reserved_ranges[3] = {
 	{ BTRFS_SB_MIRROR_OFFSET(2), SZ_64K }
 };
 
+dev_t decode_dev(u32 dev)
+{
+	unsigned major = (dev & 0xfff00) >> 8;
+	unsigned minor = (dev & 0xff) | ((dev >> 12) & 0xfff00);
+
+	return MKDEV(major, minor);
+}
+
 int ext2_acl_count(size_t size)
 {
 	ssize_t s;
diff --git a/convert/source-fs.h b/convert/source-fs.h
index bc693162..23f33567 100644
--- a/convert/source-fs.h
+++ b/convert/source-fs.h
@@ -18,9 +18,9 @@
 #define __BTRFS_CONVERT_SOURCE_FS_H__
 
 #include "kerncompat.h"
+#include <linux/kdev_t.h>
 #include <pthread.h>
 
-
 #define CONV_IMAGE_SUBVOL_OBJECTID BTRFS_FIRST_FREE_OBJECTID
 
 /*
@@ -104,6 +104,13 @@ static inline size_t acl_ea_size(int count)
 
 int ext2_acl_count(size_t size);
 
+#ifndef MKDEV
+#define MINORBITS	20
+#define MKDEV(ma, mi)	(((ma) << MINORBITS) | (mi))
+#endif
+
+dev_t decode_dev(u32 dev);
+
 struct btrfs_convert_operations {
 	const char name[SOURCE_FS_NAME_LEN];
 	int (*open_fs)(struct btrfs_convert_context *cctx, const char *devname);
diff --git a/convert/source-reiserfs.c b/convert/source-reiserfs.c
index 8b3286f6..22a35904 100644
--- a/convert/source-reiserfs.c
+++ b/convert/source-reiserfs.c
@@ -251,7 +251,7 @@ static void reiserfs_copy_inode_item(struct btrfs_inode_item *inode,
 		btrfs_set_stack_timespec_sec(&inode->mtime, sd_v1_mtime(sd));
 
 		if (!S_ISREG(mode) && !S_ISDIR(mode) && !S_ISLNK(mode))
-			rdev = new_decode_dev(sd_v1_rdev(sd));
+			rdev = decode_dev(sd_v1_rdev(sd));
 	} else {
 		struct stat_data *sd = stat_data;
 
@@ -265,7 +265,7 @@ static void reiserfs_copy_inode_item(struct btrfs_inode_item *inode,
 		btrfs_set_stack_timespec_sec(&inode->mtime, sd_v2_mtime(sd));
 
 		if (!S_ISREG(mode) && !S_ISDIR(mode) && !S_ISLNK(mode))
-			rdev = new_decode_dev(sd_v2_rdev(sd));
+			rdev = decode_dev(sd_v2_rdev(sd));
 
 		if (copy_inode_flags)
 			reiserfs_convert_inode_flags(inode, sd);
diff --git a/convert/source-reiserfs.h b/convert/source-reiserfs.h
index 0fa476a9..8de11b9c 100644
--- a/convert/source-reiserfs.h
+++ b/convert/source-reiserfs.h
@@ -24,19 +24,10 @@
 #include <reiserfs/io.h>
 #include <reiserfs/reiserfs_lib.h>
 #include <reiserfs/reiserfs_fs.h>
-#include <linux/kdev_t.h>
 #include "convert/source-fs.h"
 
 #define REISERFS_ACL_VERSION	0x0001
 
-static inline dev_t new_decode_dev(u32 dev)
-{
-	unsigned major = (dev & 0xfff00) >> 8;
-	unsigned minor = (dev & 0xff) | ((dev >> 12) & 0xfff00);
-
-	return MKDEV(major, minor);
-}
-
 #endif	/* BTRFSCONVERT_REISERFS */
 
 #endif