diff --git a/dace/frontend/python/astutils.py b/dace/frontend/python/astutils.py
index ff2d191752..49d7278462 100644
--- a/dace/frontend/python/astutils.py
+++ b/dace/frontend/python/astutils.py
@@ -182,15 +182,12 @@ def subscript_to_ast_slice(node, without_array=False):
 
     # Python <3.9 compatibility
     result_slice = None
-    if sys.version_info < (3, 9):
-        if isinstance(node.slice, ast.Index):
-            slc = node.slice.value
-            if not isinstance(slc, ast.Tuple):
-                result_slice = [slc]
-        elif isinstance(node.slice, ast.ExtSlice):
-            slc = tuple(node.slice.dims)
-        else:
-            raise TypeError('Unsupported slicing type: ' + str(type(node.slice)))
+    if sys.version_info < (3, 9) and isinstance(node.slice, ast.Index):
+        slc = node.slice.value
+        if not isinstance(slc, ast.Tuple):
+            result_slice = [slc]
+    elif sys.version_info < (3, 9) and isinstance(node.slice, ast.ExtSlice):
+        slc = tuple(node.slice.dims)
     else:
         slc = node.slice