diff --git a/libvips/foreign/dzsave.c b/libvips/foreign/dzsave.c
index d5d1d2b9..865680d7 100644
--- a/libvips/foreign/dzsave.c
+++ b/libvips/foreign/dzsave.c
@@ -366,7 +366,8 @@ vips_gsf_path( VipsGsfDirectory *tree, const char *name, ... )
 	 * path we are creating.
 	 */
 	tree->file_count += 1;
-	tree->filename_lengths += strlen( tree->out->name ) + strlen( name ) + 1;
+	tree->filename_lengths += 
+		strlen( tree->out->name ) + strlen( name ) + 1;
 
 	dir = tree; 
 	va_start( ap, name );