diff --git a/unixODBC.spec b/unixODBC.spec
index 3f615f5451c39b6a5386c490ad31d4ec3d6257c1..3989c32b400f96f0b9783d15b1833eef11f19df5 100644
--- a/unixODBC.spec
+++ b/unixODBC.spec
@@ -26,12 +26,12 @@ Development and header files for %{name}
 
 %prep
 %autosetup -p1
-autoreconf -vfi
 
 %build
 CFLAGS="%{optflags} -fno-strict-aliasing"
 CXXFLAGS="$CFLAGS"
 export CFLAGS CXXFLAGS
+autoreconf -vfi
 
 %configure --with-gnu-ld=yes --enable-threads=yes --enable-drivers=yes --enable-driverc=yes