diff --git a/loopy/codegen/__init__.py b/loopy/codegen/__init__.py
index e2540fb69dbf86f68984df7367ad0bec70c0e97c..9bc8e079ccf0fc9239e38976f6e6e89db9aa9ff6 100644
--- a/loopy/codegen/__init__.py
+++ b/loopy/codegen/__init__.py
@@ -524,6 +524,9 @@ def generate_code_v2(kernel):
         for idi in tv.decl_info(kernel.target, index_dtype=kernel.index_dtype):
             seen_dtypes.add(idi.dtype)
 
+    if kernel.all_inames():
+        seen_dtypes.add(kernel.index_dtype)
+
     preambles = kernel.preambles[:]
 
     preamble_info = PreambleInfo(
diff --git a/test/test_c_execution.py b/test/test_c_execution.py
index 75b4571004cfd046ba35f9407ce614bac0f5d2df..fd0beab141bda1f37f19658df0c97b1357ace7b6 100644
--- a/test/test_c_execution.py
+++ b/test/test_c_execution.py
@@ -351,6 +351,18 @@ def test_missing_compilers():
         __test(eval_tester, ExecutableCTarget, compiler=ccomp)
 
 
+def test_one_length_loop():
+    # https://github.com/inducer/loopy/issues/239
+    knl = lp.make_kernel(
+            "{[i]: 0<=i<1}",
+            """
+            a[i] = 42.0
+            """, target=lp.ExecutableCTarget())
+
+    _, (out, ) = knl()
+    assert out == 42
+
+
 if __name__ == "__main__":
     if len(sys.argv) > 1:
         exec(sys.argv[1])