diff --git a/check_osdb.py b/check_osdb.py
index a3d2435..5ec15ce 100755
--- a/check_osdb.py
+++ b/check_osdb.py
@@ -18,7 +18,7 @@ if __name__ == "__main__":
         with open("/etc/os-release") as f:
             lines = f.read().splitlines()
     except Exception as e:
-        print(f"UNKNOWN - {e}")
+        print("UNKNOWN - " + str(e))
         sys.exit(3)
 
     detected_os = None
@@ -45,5 +45,5 @@ if __name__ == "__main__":
         sys.exit(0)
 
     if args.expect != detected_os:
-        print(f"CRITICAL - MISSMATCH DETECTED {detected_os} != {args.expect}")
+        print("CRITICAL - MISSMATCH DETECTED {detected_os} != {args.expect}".format(**globals()))
         sys.exit(2)