diff --git a/source-builder/config/gcc-4.7-1.cfg b/source-builder/config/gcc-4.7-1.cfg
index b756457..5ecd27b 100644
--- a/source-builder/config/gcc-4.7-1.cfg
+++ b/source-builder/config/gcc-4.7-1.cfg
@@ -32,8 +32,10 @@ BuildRoot: %{_tmppath}/%{name}-root-%(%{__id_u} -n)
 #
 # GCC core and G++
 #
-Source0: ftp://ftp.gnu.org/gnu/gcc/gcc-%{gcc_version}/gcc-%{gcc_version}.tar.bz2
-VersionContro0: git clone git://gcc.gnu.org/git/gcc.git
+%ifn %{defined Source0}
+ Source0: ftp://ftp.gnu.org/gnu/gcc/gcc-%{gcc_version}/gcc-%{gcc_version}.tar.bz2
+ VersionContro0: git clone git://gcc.gnu.org/git/gcc.git
+%endif
 
 #
 # Newlib