diff --git a/dev-java/jamvm/jamvm-1.5.4.recipe b/dev-java/jamvm/jamvm-1.5.4.recipe
index e402dfc2f..ba931b270 100644
--- a/dev-java/jamvm/jamvm-1.5.4.recipe
+++ b/dev-java/jamvm/jamvm-1.5.4.recipe
@@ -50,7 +50,7 @@ BUILD()
 	aclocal
 	autoconf
 	runConfigure ./configure \
-		--with-classpath-install-dir=
+		--with-classpath-install-dir=$prefix
 	make
 }