diff --git a/sigma/conversion/base.py b/sigma/conversion/base.py
index be8a0c08..45caafcf 100644
--- a/sigma/conversion/base.py
+++ b/sigma/conversion/base.py
@@ -1110,7 +1110,7 @@ def convert_condition_field_eq_val_cidr(
                 netmask=cidr.network.netmask,
             )
         else:  # No native CIDR support: expand into string wildcard matches on prefixes.
-            expanded = cidr.expand(self.wildcard_multi)
+            expanded = cidr.expand()
             expanded_cond = ConditionOR(
                 [
                     ConditionFieldEqualsValueExpression(cond.field, SigmaString(network))