-#if defined?(HARD_MEMORY_LIMIT) and Process.const_defined?(:RLIMIT_AS)
-# Process.setrlimit Process::RLIMIT_AS, HARD_MEMORY_LIMIT*1024*1024, Process::RLIM_INFINITY
-#end
+if defined?(HARD_MEMORY_LIMIT) and defined?(PhusionPassenger) and Process.const_defined?(:RLIMIT_AS)
+ Process.setrlimit Process::RLIMIT_AS, HARD_MEMORY_LIMIT*1024*1024, Process::RLIM_INFINITY
+end