diff --git a/org.eclipse.jgit.benchmarks/.classpath b/org.eclipse.jgit.benchmarks/.classpath
index 438d155e3..1285bd9e3 100644
--- a/org.eclipse.jgit.benchmarks/.classpath
+++ b/org.eclipse.jgit.benchmarks/.classpath
@@ -18,6 +18,7 @@
 	</classpathentry>
 	<classpathentry kind="src" path=".apt_generated">
 		<attributes>
+			<attribute name="ignore_optional_problems" value="true"/>
 			<attribute name="optional" value="true"/>
 			<attribute name="maven.pomderived" value="true"/>
 			<attribute name="ignore_optional_problems" value="true"/>