diff --git a/installer/resources/wrapper.conf b/installer/resources/wrapper.conf
index 3bdae1c6a..2a2461eb6 100644
--- a/installer/resources/wrapper.conf
+++ b/installer/resources/wrapper.conf
@@ -30,8 +30,8 @@ wrapper.java.classpath.15=lib/wrapper.jar
 wrapper.java.classpath.16=lib/xercesImpl.jar
 wrapper.java.classpath.17=lib/xml-apis.jar
 wrapper.java.classpath.18=lib/jbigi.jar
-wrapper.java.classpath.18=lib/systray.jar
-wrapper.java.classpath.18=lib/systray4j.jar
+wrapper.java.classpath.19=lib/systray.jar
+wrapper.java.classpath.20=lib/systray4j.jar
 
 # Java Library Path (location of Wrapper.DLL or libwrapper.so)
 wrapper.java.library.path.1=.