diff --git a/loki/transform/transform_scalar_syntax.py b/loki/transform/transform_scalar_syntax.py
index 65e8f1eb6..497ba79c1 100644
--- a/loki/transform/transform_scalar_syntax.py
+++ b/loki/transform/transform_scalar_syntax.py
@@ -6,8 +6,8 @@
 # nor does it submit to any jurisdiction.
 
 from loki.expression import (
-    Sum, Product, IntLiteral, Scalar, Array, RangeIndex, 
-    DeferredTypeSymbol, SubstituteExpressions
+    Sum, Product, IntLiteral, Scalar, Array, RangeIndex,
+    TypedSymbol, SubstituteExpressions
     )
 from loki.ir import CallStatement
 from loki.visitors import FindNodes, Transformer
@@ -20,10 +20,19 @@
 ]
 
 def check_if_scalar_syntax(arg, dummy):
+    """
+    Check if an array argument, arg,
+    is passed to an array dummy argument, dummy,
+    using scalar syntax. i.e. arg(1,1) -> d(m,n)
+
+    Parameters
+    ----------
+    arg:   variable
+    dummy: variable
+    """
     if isinstance(arg, Array) and isinstance(dummy, Array):
         if arg.dimensions:
-            n_dummy_ranges = sum(1 for d in arg.dimensions if isinstance(d, RangeIndex))
-            if n_dummy_ranges == 0:
+            if not any(isinstance(d, RangeIndex) for d in arg.dimensions):
                 return True
     return False
 
@@ -48,7 +57,7 @@ def merge_parents(parent, symbol):
 
     new_parent = parent.clone()
     for p in symbol.parents[1:]:
-        new_parent = DeferredTypeSymbol(name=p.name_parts[-1], scope=parent.scope, parent=new_parent)
+        new_parent = TypedSymbol(name=p.name_parts[-1], scope=parent.scope, parent=new_parent)
     return symbol.clone(parent=new_parent, scope=parent.scope)
 
 
@@ -61,7 +70,7 @@ def process_symbol(symbol, caller, call):
         if symbol in call.routine.arguments:
             return call.arg_map[symbol]
 
-    elif isinstance(symbol, DeferredTypeSymbol):
+    elif isinstance(symbol, TypedSymbol):
         if symbol.parents[0] in call.routine.arguments:
             return merge_parents(call.arg_map[symbol.parents[0]], symbol)