diff --git a/src/gallia/utils.py b/src/gallia/utils.py
index c01903814..df093a7f5 100644
--- a/src/gallia/utils.py
+++ b/src/gallia/utils.py
@@ -86,6 +86,9 @@ def unravel(listing: str) -> list[int]:
     range_delimiter = "-"
     result = set()
 
+    if len(listing) == 0 or listing.isspace():
+        return []
+
     for range_element in listing.split(listing_delimiter):
         if range_delimiter in range_element:
             first_tmp, last_tmp = range_element.split(range_delimiter)