#ifndef _SIMIX_PRIVATE_H
#define _SIMIX_PRIVATE_H
+#include "src/internal_config.h"
#include "simgrid/simix.h"
#include "surf/surf.h"
#include "xbt/base.h"
/* We are using the bottom of the stack to save some information, like the
* valgrind_stack_id. Define smx_context_usable_stack_size to give the remaining
* size for the stack. */
-#ifdef HAVE_VALGRIND_H
+#if HAVE_VALGRIND_H
# define smx_context_usable_stack_size \
(smx_context_stack_size - sizeof(unsigned int)) /* for valgrind_stack_id */
#else