diff --git a/lib/sqlalchemy/dialects/postgresql/base.py b/lib/sqlalchemy/dialects/postgresql/base.py
index 363f5c58ee..e562177a7f 100644
--- a/lib/sqlalchemy/dialects/postgresql/base.py
+++ b/lib/sqlalchemy/dialects/postgresql/base.py
@@ -544,7 +544,7 @@ use the following workaround type::
 
             def handle_raw_string(value):
                 inner = re.match(r"^{(.*)}$", value).group(1)
-                return inner.split(",")
+                return inner.split(",") if inner else []
 
             def process(value):
                 if value is None: