diff --git a/tomcat-cas/bin/setclasspath.sh b/tomcat-cas/bin/setclasspath.sh
old mode 100644
new mode 100755
index 873fad3..5232b8e
--- a/tomcat-cas/bin/setclasspath.sh
+++ b/tomcat-cas/bin/setclasspath.sh
@@ -79,8 +79,12 @@
 
 # Don't override the endorsed dir if the user has set it previously
 if [ -z "$JAVA_ENDORSED_DIRS" ]; then
-  # Set the default -Djava.endorsed.dirs argument
-  JAVA_ENDORSED_DIRS="$CATALINA_HOME"/endorsed
+  # Java 9 no longer supports the java.endorsed.dirs
+  # system property. Only try to use it if
+  # CATALINA_HOME/endorsed exists.
+  if [ -d "$CATALINA_HOME"/endorsed ]; then
+    JAVA_ENDORSED_DIRS="$CATALINA_HOME"/endorsed
+  fi
 fi
 
 # Set standard commands for invoking Java, if not already set.
@@ -91,4 +95,4 @@
   if [ -z "$_RUNJDB" ]; then
     _RUNJDB="$JAVA_HOME"/bin/jdb
   fi
-fi
\ No newline at end of file
+fi