diff --git a/loopy/target/c/codegen/expression.py b/loopy/target/c/codegen/expression.py
index 6d06d8a79d800d9b874537c3c5086ec0af5cb14a..34345477764811e082bd129b096c9e2a843520b6 100644
--- a/loopy/target/c/codegen/expression.py
+++ b/loopy/target/c/codegen/expression.py
@@ -176,7 +176,7 @@ class ExpressionToCExpressionMapper(IdentityMapper):
                 lambda expr: evaluate(expr, self.codegen_state.var_subst_map),
                 self.codegen_state.vectorization_info)
 
-        from loopy.kernel.data import ImageArg, GlobalArg, TemporaryVariable
+        from loopy.kernel.data import ImageArg, GlobalArg, TemporaryVariable, ConstantArg
 
         if isinstance(ary, ImageArg):
             extra_axes = 0
@@ -209,7 +209,7 @@ class ExpressionToCExpressionMapper(IdentityMapper):
                 raise NotImplementedError(
                         "non-floating-point images not supported for now")
 
-        elif isinstance(ary, (GlobalArg, TemporaryVariable)):
+        elif isinstance(ary, (GlobalArg, TemporaryVariable, ConstantArg)):
             if len(access_info.subscripts) == 0:
                 if isinstance(ary, GlobalArg):
                     # unsubscripted global args are pointers
diff --git a/loopy/target/opencl.py b/loopy/target/opencl.py
index 9c2d428b03c325d3ca8b6af398beb79406bd5170..f0436099c6127e6426b03df2c48342b6ee99c67f 100644
--- a/loopy/target/opencl.py
+++ b/loopy/target/opencl.py
@@ -486,11 +486,11 @@ class OpenCLCASTBuilder(CASTBuilder):
         return CLImage(num_target_axes, mode, name)
 
     def get_constant_arg_decl(self, name, shape, dtype, is_written):
-        from loopy.codegen import POD  # uses the correct complex type
+        from loopy.target.c import POD  # uses the correct complex type
         from cgen import RestrictPointer, Const
         from cgen.opencl import CLConstant
 
-        arg_decl = RestrictPointer(POD(dtype, name))
+        arg_decl = RestrictPointer(POD(self, dtype, name))
 
         if not is_written:
             arg_decl = Const(arg_decl)