diff --git a/src/space.c b/src/space.c
index bf71f9d84caaeb1970cc61859803d3e8bb4e6a56..a44a9e43f6c828e1ddd962370b93d50cdb76e814 100644
--- a/src/space.c
+++ b/src/space.c
@@ -44,6 +44,7 @@
 #include "chemistry.h"
 #include "const.h"
 #include "cooling.h"
+#include "debug.h"
 #include "engine.h"
 #include "error.h"
 #include "gravity.h"