diff --git a/src/inifix/enotation.py b/src/inifix/enotation.py
index 79c351f..07c06fe 100644
--- a/src/inifix/enotation.py
+++ b/src/inifix/enotation.py
@@ -136,8 +136,7 @@ def encode(r: float, /) -> str:
         if not base.strip(".0"):
             return "0e0"
         max_ndigit = len(base.replace(".", "")) - 1
-        fmt = f".{max_ndigit}e"
-        return ENotationIO.simplify(f"{r:{fmt}}")
+        return ENotationIO.simplify(f"{r:.{max_ndigit}e}")
 
     @staticmethod
     def encode_preferential(r: float, /) -> str: