diff --git a/third_party/ibis/ibis_addon/operations.py b/third_party/ibis/ibis_addon/operations.py
index 140f80b42..6757f5e2a 100644
--- a/third_party/ibis/ibis_addon/operations.py
+++ b/third_party/ibis/ibis_addon/operations.py
@@ -240,7 +240,8 @@ def sa_format_hashbytes_mssql(translator, expr):
 def sa_format_hashbytes_oracle(translator, expr):
     arg, how = expr.op().args
     compiled_arg = translator.translate(arg)
-    hash_func = sa.func.standard_hash(compiled_arg, sa.sql.literal_column("'SHA256'"))
+    convert = sa.func.convert(compiled_arg, sa.sql.literal_column("'UTF8'"))
+    hash_func = sa.func.standard_hash(convert, sa.sql.literal_column("'SHA256'"))
     return sa.func.lower(hash_func)
 
 def sa_format_hashbytes_mysql(translator, expr):