diff --git a/unix/build-xorg-7.4 b/unix/build-xorg-7.4
index 69b5a03..a783f60 100755
--- a/unix/build-xorg-7.4
+++ b/unix/build-xorg-7.4
@@ -78,7 +78,9 @@
     popd
 
     cd ..
-    autoreconf -fiv
+    if [ ! -f ./configure ]; then
+        autoreconf -fiv
+    fi
     cd unix
 }