diff --git a/build.xml b/build.xml
index ea8b3c11..41148cfa 100644
--- a/build.xml
+++ b/build.xml
@@ -84,7 +84,7 @@
 				<property name="clover-path" value="../build/logs/clover.xml" override="true" />
 				<property name="coverage-html-path" value="../build/coverage" override="true" />
 				<exec dir="${build-directory}/../phpbb" command="cp ../../test_config_22x.php tests/test_config.php" passthru="true" />
-				<exec dir="${build-directory}/../phpbb" command="chmod 777 phpBB/cache" passthru="true" />
+				<exec dir="${build-directory}/../phpbb" command="chmod -R 777 phpBB/cache" passthru="true" />
 				<exec dir="${build-directory}/../phpbb" command="chmod 777 phpBB/files" passthru="true" />
 				<exec dir="${build-directory}/../phpbb" command="chmod 777 phpBB/store" passthru="true" />
 				<exec dir="${build-directory}/../phpbb" command="chmod 777 phpBB/images/avatars/upload" passthru="true" />