diff --git a/src/Lib/Geometry/util.hxx b/src/Lib/Geometry/util.hxx
index 887f753f..2fdb8c03 100644
--- a/src/Lib/Geometry/util.hxx
+++ b/src/Lib/Geometry/util.hxx
@@ -109,7 +109,7 @@ Rectangle makeBounds (const TGPolygon &polygon);
  * @param s The string.
  * @return A rectangle containing the bounds.
  */
-Rectangle parseChunk (const string &s, double delta = 10.0);
+Rectangle parseChunk (const string &s, double delta);
 
 
 /**