--- qb_interpreter_functions.h.orig	2014-12-10 10:54:35.485422703 +0000
+++ qb_interpreter_functions.h	2014-12-10 10:54:54.694421330 +0000
@@ -22,6 +22,8 @@
 #ifndef QB_INTERPRETER_FUNCTIONS_H_
 #define QB_INTERPRETER_FUNCTIONS_H_
 
+#include <missing_complex.h>
+
 int qb_compare_ascending_F32(const void *p1, const void *p2);
 int qb_compare_ascending_F32_array(const void *p1, const void *p2, const void *p3);
 int qb_compare_ascending_F64(const void *p1, const void *p2);