diff --git a/gcc/c-tree.h b/gcc/c-tree.h
index 876f728d23e..7600dd2e62c 100644
--- a/gcc/c-tree.h
+++ b/gcc/c-tree.h
@@ -212,6 +212,10 @@ extern tree long_integer_type_node;
 extern tree long_long_integer_type_node;
 extern tree long_long_unsigned_type_node;
 extern tree long_unsigned_type_node;
+extern tree complex_integer_type_node;
+extern tree complex_float_type_node;
+extern tree complex_double_type_node;
+extern tree complex_long_double_type_node;
 extern tree ptr_type_node;
 extern tree ptrdiff_type_node;
 extern tree short_integer_type_node;