diff --git a/ntfsprogs/utils.c b/ntfsprogs/utils.c
index 94ba6df9..c492758d 100644
--- a/ntfsprogs/utils.c
+++ b/ntfsprogs/utils.c
@@ -253,7 +253,7 @@ int utils_valid_device(const char *name, int force)
 /**
  * utils_mount_volume - Mount an NTFS volume
  */
-ntfs_volume * utils_mount_volume(const char *device, ntfs_mount_flags flags)
+ntfs_volume * utils_mount_volume(const char *device, unsigned long flags)
 {
 	ntfs_volume *vol;
 
diff --git a/ntfsprogs/utils.h b/ntfsprogs/utils.h
index cb4ac9d6..3974da00 100644
--- a/ntfsprogs/utils.h
+++ b/ntfsprogs/utils.h
@@ -55,7 +55,7 @@ ATTR_RECORD * find_attribute(const ATTR_TYPES type, ntfs_attr_search_ctx *ctx);
 ATTR_RECORD * find_first_attribute(const ATTR_TYPES type, MFT_RECORD *mft);
 
 int utils_valid_device(const char *name, int force);
-ntfs_volume * utils_mount_volume(const char *device, ntfs_mount_flags flags);
+ntfs_volume * utils_mount_volume(const char *device, unsigned long flags);
 
 /**
  * defines...