diff --git a/monitor/gen-fan-monitor-defs.py b/monitor/gen-fan-monitor-defs.py
new file mode 100755
index 0000000..4e49787
--- /dev/null
+++ b/monitor/gen-fan-monitor-defs.py
@@ -0,0 +1,73 @@
+#!/usr/bin/env python
+
+import os
+import sys
+import yaml
+from argparse import ArgumentParser
+from mako.template import Template
+
+"""
+This script generates the data structures for the
+phosphor-fan-monitor application.
+
+A future improvement is to get the fan inventory names
+from a separate file, so just that file could be generated
+from the MRW.
+"""
+
+
+tmpl = '''/* This is a generated file. */
+#include "fan_defs.hpp"
+#include "types.hpp"
+
+using namespace phosphor::fan::monitor;
+
+const std::vector<FanDefinition> fanDefinitions
+{
+%for fan_data in data:
+    FanDefinition{"${fan_data['inventory']}",
+                  ${fan_data['allowed_out_of_range_time']},
+                  ${fan_data['deviation']},
+                  ${fan_data['num_sensors_nonfunc_for_fan_nonfunc']},
+                  std::vector<SensorDefinition>{
+                  %for sensor in fan_data['sensors']:
+                  <%
+                      #has_target is a bool, and we need a true instead of True
+                      has_target = str(sensor['has_target']).lower()
+                  %> \
+                      SensorDefinition{"${sensor['name']}", ${has_target}},
+                  %endfor
+                  },
+    },
+%endfor
+};
+'''
+
+
+if __name__ == '__main__':
+    parser = ArgumentParser(
+        description="Phosphor fan monitor definition parser")
+
+    parser.add_argument('-m', '--monitor_yaml', dest='monitor_yaml',
+                        default="example/monitor.yaml",
+                        help='fan monitor definitional yaml')
+    parser.add_argument('-o', '--output_dir', dest='output_dir',
+                        default=".",
+                        help='output directory')
+    args = parser.parse_args()
+
+    if not args.monitor_yaml:
+        parser.print_usage()
+        sys.exit(-1)
+
+    with open(args.monitor_yaml, 'r') as monitor_input:
+        monitor_data = yaml.safe_load(monitor_input) or {}
+
+    #Do some minor input validation
+    for fan in monitor_data:
+        if ((fan['deviation'] < 0) or (fan['deviation'] > 100)):
+            sys.exit("Invalid deviation value " + str(fan['deviation']))
+
+    output_file = os.path.join(args.output_dir, "fan_monitor_defs.cpp")
+    with open(output_file, 'w') as output:
+        output.write(Template(tmpl).render(data=monitor_data))