diff --git a/lib/create.c b/lib/create.c
index 9801b7fdb..f1a16a19e 100644
--- a/lib/create.c
+++ b/lib/create.c
@@ -52,8 +52,8 @@ static int disk_create_qcow2 (guestfs_h *g, const char *filename, int64_t size,
 
 int
 guestfs_impl_disk_create (guestfs_h *g, const char *filename,
-			  const char *format, int64_t size,
-			  const struct guestfs_disk_create_argv *optargs)
+                          const char *format, int64_t size,
+                          const struct guestfs_disk_create_argv *optargs)
 {
   const char *backingfile;