diff --git a/loopy/target/c/__init__.py b/loopy/target/c/__init__.py
index be1a81bcd4f03875ac78d2a267d2ea5257ee5ad8..34edb17de38c377a16067fc9dcd259b8f46787ad 100644
--- a/loopy/target/c/__init__.py
+++ b/loopy/target/c/__init__.py
@@ -549,6 +549,17 @@ class CASTBuilder(ASTBuilderBase):
 
         return arg_decl
 
+    def get_constant_arg_decl(self, name, shape, dtype, is_written):
+        from loopy.target.c import POD  # uses the correct complex type
+        from cgen import RestrictPointer, Const
+
+        arg_decl = RestrictPointer(POD(self, dtype, name))
+
+        if not is_written:
+            arg_decl = Const(arg_decl)
+
+        return arg_decl
+
     def emit_assignment(self, codegen_state, insn):
         kernel = codegen_state.kernel
         ecm = codegen_state.expression_to_code_mapper
diff --git a/loopy/target/cuda.py b/loopy/target/cuda.py
index 36650e1d22f467d523eac7572a976133ea42d387..d31718f15ed563bba0b602e6017536b72b6deed0 100644
--- a/loopy/target/cuda.py
+++ b/loopy/target/cuda.py
@@ -336,7 +336,7 @@ class CUDACASTBuilder(CASTBuilder):
         from cgen import RestrictPointer, Const
         from cgen.cuda import CudaConstant
 
-        arg_decl = RestrictPointer(POD(dtype, name))
+        arg_decl = RestrictPointer(POD(self, dtype, name))
 
         if not is_written:
             arg_decl = Const(arg_decl)