diff --git a/src/pdf_filler.py b/src/pdf_filler.py
index 17accc1..81ae1dc 100644
--- a/src/pdf_filler.py
+++ b/src/pdf_filler.py
@@ -154,7 +154,13 @@ def _update_widget_visibility(writer: PdfWriter, fields: Dict[str, str]) -> None
     HIDDEN_FIELD_PREFIXES = ("ist.", "plan.")
     HIDDEN_BIT = 2  # PDF annotation flag bit 2 = Hidden
     # Summary fields whose /DA may use white text (1 g); patch to black (0 g).
-    SUM_FIELDS = {"anwesend_sum", "pauschale_5_sum", "pauschale_25_sum", "pauschale_sum"}
+    SUM_FIELDS = {
+        "anwesend_sum",
+        "anwesend_gessum",
+        "pauschale_5_sum",
+        "pauschale_25_sum",
+        "pauschale_sum",
+    }
 
     for page in writer.pages:
         annots = page.get("/Annots")