diff --git a/supervisor/options.py b/supervisor/options.py
index 540b3f3fc..22f712850 100644
--- a/supervisor/options.py
+++ b/supervisor/options.py
@@ -839,7 +839,7 @@ def process_config(self, do_usage=True):
             if getattr(self, name) is None:
                 self.usage(message)
 
-        print(f"Before setting defaults - minfds: {self.minfds}, minprocs: {self.minprocs}")
+        print("Before setting defaults - minfds: {}, minprocs: {}".format(self.minfds, self.minprocs))
 
         if self.minfds is None:
             self.minfds = 1024