diff --git a/src/logger_io.h b/src/logger_io.h
index f5b1274fb7b957d5b48bc8425bf784c586ac6a08..574fc0129d4553e1a46bc747945e7a4318186600 100644
--- a/src/logger_io.h
+++ b/src/logger_io.h
@@ -51,10 +51,10 @@ __attribute__((always_inline)) INLINE static void hydro_write_index(
 
   /* List what we want to write */
   list[0] = io_make_output_field("ParticleIDs", ULONGLONG, 1,
-                                 UNIT_CONV_NO_UNITS, parts, id);
+                                 UNIT_CONV_NO_UNITS, 0.f, parts, id, "will be erased");
 
-  list[1] = io_make_output_field("Offset", ULONGLONG, 1, UNIT_CONV_NO_UNITS,
-                                 xparts, logger_data.last_offset);
+  list[1] = io_make_output_field("Offset", ULONGLONG, 1, UNIT_CONV_NO_UNITS, 0.f,
+                                 xparts, logger_data.last_offset, "will be erased");
 }
 #endif