diff --git a/cf/test-package.m4 b/cf/test-package.m4
index eb6b1b241..f8372a8bc 100644
--- a/cf/test-package.m4
+++ b/cf/test-package.m4
@@ -67,6 +67,14 @@ fi
 $1_cflags=
 $1_libs=
 
+case "$with_$1_config" in
+yes|no|""|"$7")
+	if test -f $with_$1/bin/$7 ; then
+		with_$1_config=$with_$1/bin/$7
+	fi
+	;;
+esac
+
 case "$with_$1_config" in
 yes|no|"")
 	;;