diff --git a/ast_function.cpp b/ast_function.cpp
index 2869837..cd57c32 100644
--- a/ast_function.cpp
+++ b/ast_function.cpp
@@ -264,7 +264,7 @@
 
    if (constructor_type->length == 0) {
       constructor_type =
-	 glsl_type::get_array_instance(constructor_type->get_base_type(),
+	 glsl_type::get_array_instance(constructor_type->element_type(),
 				       parameter_count);
       assert(constructor_type != NULL);
       assert(constructor_type->length == parameter_count);