diff --git a/CHANGELOG.md b/CHANGELOG.md
index 026512a..c4c992f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## 0.16
 
+### 0.16.3
+
+- fix: Ensure existing functions are normalized in all cases.
+
 ### 0.16.2
 
 - fix: Cast pg_proc char columns to Text explicitly
diff --git a/pyproject.toml b/pyproject.toml
index 661802f..fa2966f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "sqlalchemy-declarative-extensions"
-version = "0.16.2"
+version = "0.16.3"
 authors = [
     {name = "Dan Cardin", email = "ddcardin@gmail.com"},
 ]
diff --git a/src/sqlalchemy_declarative_extensions/dialects/postgresql/function.py b/src/sqlalchemy_declarative_extensions/dialects/postgresql/function.py
index 2598b98..b45c1c8 100644
--- a/src/sqlalchemy_declarative_extensions/dialects/postgresql/function.py
+++ b/src/sqlalchemy_declarative_extensions/dialects/postgresql/function.py
@@ -255,12 +255,6 @@ def from_unknown(
                 )
 
             return cls(table=table_return_params)
-            # # Basic normalization: lowercase and remove extra spaces
-            # # This might need refinement for complex TABLE definitions
-            # inner_content = returns_lower[len("table(") : -1].strip()
-            # cols = [normalize_arg(c) for c in inner_content.split(",")]
-            # normalized_returns = f"table({', '.join(cols)})"
-            # return cls()
 
         # Normalize base return type (including array types)
         norm_type = type_map.get(returns_lower, returns_lower)
diff --git a/src/sqlalchemy_declarative_extensions/function/compare.py b/src/sqlalchemy_declarative_extensions/function/compare.py
index c5b6e06..d8eb472 100644
--- a/src/sqlalchemy_declarative_extensions/function/compare.py
+++ b/src/sqlalchemy_declarative_extensions/function/compare.py
@@ -56,7 +56,9 @@ def compare_functions(connection: Connection, functions: Functions) -> list[Oper
 
     raw_existing_functions = get_functions(connection)
     existing_functions = filter_functions(raw_existing_functions, functions.ignore)
-    existing_functions_by_name = {r.qualified_name: r for r in existing_functions}
+    existing_functions_by_name = {
+        f.qualified_name: f.normalize() for f in existing_functions
+    }
     existing_function_names = set(existing_functions_by_name)
 
     new_function_names = expected_function_names - existing_function_names
@@ -75,8 +77,7 @@ def compare_functions(connection: Connection, functions: Functions) -> list[Oper
             result.append(CreateFunctionOp(normalized_function))
         else:
             existing_function = existing_functions_by_name[function_name]
-
-            normalized_existing_function = existing_function.normalize()
+            normalized_existing_function = existing_function
 
             if normalized_existing_function != normalized_function:
                 result.append(
diff --git a/tests/function/test_function_normalization.py b/tests/function/test_function_normalization.py
new file mode 100644
index 0000000..afca50a
--- /dev/null
+++ b/tests/function/test_function_normalization.py
@@ -0,0 +1,55 @@
+from pytest_mock_resources import create_postgres_fixture
+from sqlalchemy import text
+
+from sqlalchemy_declarative_extensions import (
+    declarative_database,
+    register_sqlalchemy_events,
+)
+from sqlalchemy_declarative_extensions.function.compare import (
+    DropFunctionOp,
+    compare_functions,
+)
+from sqlalchemy_declarative_extensions.sqlalchemy import declarative_base
+
+_Base = declarative_base()
+
+
+@declarative_database
+class Base(_Base):  # type: ignore
+    __abstract__ = True
+
+    functions: list = []
+
+
+register_sqlalchemy_events(Base.metadata, functions=True)
+
+pg = create_postgres_fixture(engine_kwargs={"echo": True}, session=True)
+
+
+def test_existing_function_normalized(pg):
+    Base.metadata.create_all(bind=pg.connection())
+    pg.commit()
+
+    pg.execute(
+        text(
+            """
+    CREATE OR REPLACE FUNCTION echo_any_element(
+        input_value ANYELEMENT
+    )
+    RETURNS ANYELEMENT
+    LANGUAGE sql
+    AS $$
+        -- A generic function using the ANYELEMENT polymorphic type
+        SELECT input_value;
+    $$;
+    """
+        )
+    )
+
+    connection = pg.connection()
+    diff = compare_functions(connection, Base.metadata.info["functions"])
+
+    assert len(diff) == 1
+    assert isinstance(diff[0], DropFunctionOp)
+    assert "DROP FUNCTION" in diff[0].to_sql()[0]
+    assert "CREATE FUNCTION" in diff[0].reverse().to_sql()[0]
diff --git a/tests/schema/test_snowflake.py b/tests/schema/test_snowflake.py
index 85264ce..db80fc0 100644
--- a/tests/schema/test_snowflake.py
+++ b/tests/schema/test_snowflake.py
@@ -1,10 +1,9 @@
-from sqlalchemy import Column, text, types
+from sqlalchemy import text
 from sqlalchemy.engine import Engine, create_engine
 
 from sqlalchemy_declarative_extensions import (
     declarative_database,
     register_sqlalchemy_events,
-    view,
 )
 from sqlalchemy_declarative_extensions.sqlalchemy import declarative_base
 
@@ -31,7 +30,7 @@ def test_create_schemas_filtered_to_database(snowflake: Engine):
     """
     Base.metadata.create_all(bind=snowflake)
 
-    engine = create_engine('snowflake://user:password@account/db/schema')
+    engine = create_engine("snowflake://user:password@account/db/schema")
     with engine.connect() as conn:
         Base.metadata.create_all(engine)
 
diff --git a/tests/trigger/test_drop_postgres.py b/tests/trigger/test_drop_postgres.py
index 8d2d1bc..0881ea2 100644
--- a/tests/trigger/test_drop_postgres.py
+++ b/tests/trigger/test_drop_postgres.py
@@ -26,7 +26,7 @@ class Foo(Base):
 
 
 class TableWithSpecialName(Base):
-    __tablename__ = "user" # This name will trip up unquoted identifiers
+    __tablename__ = "user"  # This name will trip up unquoted identifiers
 
     id = Column(types.Integer(), primary_key=True)
 
diff --git a/tests/view/test_escaped_bindparam.py b/tests/view/test_escaped_bindparam.py
index cf34f2d..9eed57e 100644
--- a/tests/view/test_escaped_bindparam.py
+++ b/tests/view/test_escaped_bindparam.py
@@ -6,11 +6,8 @@
     register_sqlalchemy_events,
     view,
 )
-from sqlalchemy_declarative_extensions.alembic.view import UpdateViewOp
-from sqlalchemy_declarative_extensions.dialects import postgresql
 from sqlalchemy_declarative_extensions.dialects.postgresql import View
 from sqlalchemy_declarative_extensions.sqlalchemy import declarative_base
-from sqlalchemy_declarative_extensions.view.compare import compare_views
 
 _Base = declarative_base()
 
@@ -48,6 +45,12 @@ def test_escape_bindparam_postgres(pg):
 
     # Make sure that bindparams escaping doesn't create unnecessary escapes
     # for the literal casts that appear after view definition round-tripping
-    rendered = View("simple_select", "SELECT 'a' as col1").render_definition(pg.connection())
-    assert "::" in rendered, "Literals in the view definition are expected to get explicit type casts"
-    assert "\\:\\:" not in rendered, "Bind parameters escaping should leave type casts unescaped"
+    rendered = View("simple_select", "SELECT 'a' as col1").render_definition(
+        pg.connection()
+    )
+    assert (
+        "::" in rendered
+    ), "Literals in the view definition are expected to get explicit type casts"
+    assert (
+        "\\:\\:" not in rendered
+    ), "Bind parameters escaping should leave type casts unescaped"
diff --git a/uv.lock b/uv.lock
index 96df286..93d097f 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1415,7 +1415,7 @@ mypy = [
 
 [[package]]
 name = "sqlalchemy-declarative-extensions"
-version = "0.15.13"
+version = "0.16.3"
 source = { editable = "." }
 dependencies = [
     { name = "sqlalchemy" },