{code}
 # hold jobs that are more than 10% over memory assigned to the slot.
 MEMORY_EXCEEDED = ((MemoryUsage*1.1 > Memory) =!= TRUE)
-PREEMPT = $(PREEMPT)) || $(MEMORY_EXCEEDED)
+PREEMPT = ($(PREEMPT)) || $(MEMORY_EXCEEDED)
 WANT_SUSPEND = $(WANT_SUSPEND) && $(MEMORY_EXCEEDED)
 WANT_HOLD = $(MEMORY_EXCEEDED)
 WANT_HOLD_REASON = ifThenElse( $(MEMORY_EXCEEDED), \