diff --git a/graphviz.spec b/graphviz.spec
index cadd780..9112abf 100644
--- a/graphviz.spec
+++ b/graphviz.spec
@@ -47,12 +47,13 @@ BuildRequires:	flex
 BuildRequires:	libtool
 BuildRequires:	swig
 BuildRequires:  go
+BuildRequires:  tar
 BuildRequires:  qmake5
 BuildRequires:	gd-devel
 BuildRequires:	gettext-devel
 # jpeg:          No (only required by internal libgd)
 #BuildRequires:	jpeg-devel
-BuildRequires:	libltdl-devel
+BuildRequires:	%{_lib}ltdl-devel
 BuildRequires:	pkgconfig(expat)
 BuildRequires:	pkgconfig(fontconfig)
 BuildRequires:	pkgconfig(freetype2)