diff --git a/ibis/backends/duckdb/registry.py b/ibis/backends/duckdb/registry.py
index 90453118f469..a83929795007 100644
--- a/ibis/backends/duckdb/registry.py
+++ b/ibis/backends/duckdb/registry.py
@@ -562,6 +562,7 @@ def _array_remove(t, op):
         ops.GeoConvert: _geo_convert,
         # other ops
         ops.TimestampRange: fixed_arity(sa.func.range, 3),
+        ops.RegexSplit: fixed_arity(sa.func.str_split_regex, 2),
     }
 )