diff --git a/loopy/target/c/__init__.py b/loopy/target/c/__init__.py
index f187ca859e2e997b6de0c1259a4030650a96cb9e..8869ebecf3e08bf7921d4c9118dd1fda263adb32 100644
--- a/loopy/target/c/__init__.py
+++ b/loopy/target/c/__init__.py
@@ -1084,9 +1084,11 @@ class CTarget(CFamilyTarget):
     @memoize_method
     def get_dtype_registry(self):
         from loopy.target.c.compyte.dtypes import (
-                DTypeRegistry, fill_registry_with_c99_stdint_types)
+                DTypeRegistry, fill_registry_with_c99_stdint_types,
+                fill_registry_with_c99_complex_types)
         result = DTypeRegistry()
         fill_registry_with_c99_stdint_types(result)
+        fill_registry_with_c99_complex_types(result)
         return DTypeRegistryWrapper(result)