diff --git a/src/core/object-in-fluid/affinity.hpp b/src/core/object-in-fluid/affinity.hpp
index 845e1f2073d..69ad04e1132 100644
--- a/src/core/object-in-fluid/affinity.hpp
+++ b/src/core/object-in-fluid/affinity.hpp
@@ -30,8 +30,8 @@
 #include "integrate.hpp"
 #include "nonbonded_interactions/nonbonded_interaction_data.hpp"
 #include "particle_data.hpp"
-#include "utils.hpp"
 #include "random.hpp"
+#include "utils.hpp"
 
 #ifdef AFFINITY