diff --git a/imap_processing/ena_maps/ena_maps.py b/imap_processing/ena_maps/ena_maps.py
index e2416542f..73e72429e 100644
--- a/imap_processing/ena_maps/ena_maps.py
+++ b/imap_processing/ena_maps/ena_maps.py
@@ -1804,8 +1804,10 @@ def calculate_rect_pixel_value_from_healpix_map_n_subdivisions(
             )
         # Log the mean pixel value and the number of subdivisions for debugging
         logger.debug(
-            f"    Mean pixel value at Number of subdivisions: {num_subdivisions}: "
-            f"array of shape {mean_pixel_value.shape}: {mean_pixel_value}"
+            "    Mean pixel value at Number of subdivisions: %s: array of shape %s: %s",
+            num_subdivisions,
+            mean_pixel_value.shape,
+            mean_pixel_value,
         )
         return mean_pixel_value