diff --git a/libsrc/ffdec_lib/build_common.xml b/libsrc/ffdec_lib/build_common.xml
index 9cb639ff7..38fa7e4a8 100644
--- a/libsrc/ffdec_lib/build_common.xml
+++ b/libsrc/ffdec_lib/build_common.xml
@@ -241,7 +241,7 @@
         </pathconvert>
         <script language="javascript"><![CDATA[
         var classpath = project.getProperty("lexers");
-        var parts = classpath.split("|");
+        var parts = classpath.split(/\|/);
         for each (var part in parts) {
             project.setProperty("lexer",project.getProperty("LEXERSDIR")+part);
             self.project.executeTarget("-lexer");