diff --git a/tird/tird.py b/tird/tird.py
index 782c1fc..7a16f4d 100755
--- a/tird/tird.py
+++ b/tird/tird.py
@@ -2058,7 +2058,7 @@ def main() -> NoReturn:
 M: int = 2 ** 20
 G: int = 2 ** 30
 
-MIN_PRINT_INTERVAL: int = 5
+MIN_PRINT_INTERVAL: float = 5.0
 
 BYTEORDER: str = 'little'