diff --git a/libass.spec b/libass.spec
index 361f76f..4814d3b 100644
--- a/libass.spec
+++ b/libass.spec
@@ -66,7 +66,7 @@ This package is needed if you want to develop / compile against libASS.
 
 %build
 %configure \
-  --disable-silent-rules \
+	--disable-silent-rules \
 	--disable-static
 make %{?_smp_mflags}