diff --git a/loopy/check.py b/loopy/check.py
index 7d032f035b876cb0c476d8056c740d3149a677f1..6c26e15109d6250211fdec96ebbe07d7ddf25689 100644
--- a/loopy/check.py
+++ b/loopy/check.py
@@ -241,7 +241,7 @@ def check_implemented_domains(kernel, implemented_domains):
 
             parameter_inames = set(
                     insn_domain.get_dim_name(dim_type.param, i)
-                    for i in range(kernel.domain.dim(dim_type.param)))
+                    for i in range(insn_domain.dim(dim_type.param)))
 
             lines = []
             for kind, diff_set in [