diff --git a/CHANGELOG b/CHANGELOG
index 7333a3e..4d6a9de 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,6 @@
 Maui 3.3.1
   - Fixed issue where hostlist was being overwritten resulting in broken $PBS_NODEFILE. (Alexis Cousein)
+  - Fixed issue where users could set system priority on their own jobs. (Bas van der Vlies)
 
 Maui 3.3
   - Fixed configure script. Was putting RMCFG[name] TYPE=PBS@RMNMHOST@.
diff --git a/src/server/UserI.c b/src/server/UserI.c
index a1abead..75a229a 100644
--- a/src/server/UserI.c
+++ b/src/server/UserI.c
@@ -5521,7 +5521,14 @@ int MUIJobSetAttr(
       {
       long tmpPrio;
 
-      tmpPrio = strtol(Val,NULL,0);
+      if (!(CFlags & ((1 << fAdmin1) | (1 << fAdmin2))))
+        {
+        sprintf(Msg,"ERROR:  not authorized to run this command");
+
+        return(FAILURE);
+        }
+
+      tmpPrio = strtol(Val,NULL,0); 
 
       if ((tmpPrio < 0) || (tmpPrio > 1000))
         {