diff --git a/src/mdio/segy/compat.py b/src/mdio/segy/compat.py
index a58aee8b..77b4b620 100644
--- a/src/mdio/segy/compat.py
+++ b/src/mdio/segy/compat.py
@@ -132,6 +132,7 @@ def revision_encode(binary_header: dict, version_str: str) -> dict:
         raise InvalidMDIOError(msg) from KeyError
 
     code = (major << 8) | minor
+    code_hex = f"0x{code:04x}"
     binary_header["segy_revision"] = code
-    logger.info(f"Encoded revision {major}.{minor} to {code=} ~ {f"0x{code:04x}"}")
+    logger.info(f"Encoded revision {major}.{minor} to {code=} ~ {code_hex}")
     return binary_header