diff --git a/build.xml b/build.xml
index 7e2ea891..4a732b5e 100644
--- a/build.xml
+++ b/build.xml
@@ -584,6 +584,7 @@
 
 		<apply executable="signtool.exe" dir="${dir.installer}/msi" parallel="true" failonerror="true">
 			<arg line="sign /fd SHA256 /t http://time.certum.pl/ /v /a" />
+			<srcfile />
 			<fileset dir="${dir.dist}" includes="*.msi" />
 		</apply>
 	</target>