diff --git a/src/engine.c b/src/engine.c
index 320b0aa7293839fcf255823873334620baa40357..93663e65296da2bda4190ca861ecc155055ea5d3 100644
--- a/src/engine.c
+++ b/src/engine.c
@@ -5140,7 +5140,7 @@ void engine_dump_snapshot(struct engine *e) {
 /**
  * @brief Returns the initial affinity the main thread is using.
  */
-static cpu_set_t *engine_entry_affinity() {
+cpu_set_t *engine_entry_affinity() {
 
   static int use_entry_affinity = 0;
   static cpu_set_t entry_affinity;
diff --git a/src/engine.h b/src/engine.h
index 6f94b514114d539b9c72935c47b2764f036dddee..d61769034fd6d72d49e729f52b9f01e2f90a653b 100644
--- a/src/engine.h
+++ b/src/engine.h
@@ -377,6 +377,10 @@ void engine_unpin();
 void engine_clean(struct engine *e);
 int engine_estimate_nr_tasks(struct engine *e);
 
+#ifdef HAVE_SETAFFINITY
+cpu_set_t *engine_entry_affinity();
+#endif
+
 /* Struct dump/restore support. */
 void engine_struct_dump(struct engine *e, FILE *stream);
 void engine_struct_restore(struct engine *e, FILE *stream);