--- guile-1.8.1-r1.ebuild	2007-01-27 14:03:43.000000000 +0100
+++ guile-1.8.1-r2.ebuild	2007-01-27 14:05:39.000000000 +0100
@@ -36,7 +36,7 @@
 		$(use_enable debug-freelist) \
 		$(use_enable debug-malloc) \
 		$(use_enable debug guile-debug) \
-		$(use_with threads) \
+		$(use_enable threads) \
 		--with-modules
 
 	emake || die "make failed"