diff --git a/activefires_pp/post_processing.py b/activefires_pp/post_processing.py
index ebefc5f..99121ff 100644
--- a/activefires_pp/post_processing.py
+++ b/activefires_pp/post_processing.py
@@ -348,7 +348,7 @@ def _setup_and_start_communication(self):
         tic = time.time()
         units = {'temperature': 'degC'}
         self.unit_converter = UnitConverter(units)
-        logger.debug("Unit conversion initialization with Pint took %f seconds.", tic - time.time())
+        logger.debug("Unit conversion initialization with Pint took %f seconds.", time.time() - tic)
 
         self._check_borders_shapes_exists()