diff --git a/src/prelude-correlator.c b/src/prelude-correlator.c
index 1dcba88..80ff171 100644
--- a/src/prelude-correlator.c
+++ b/src/prelude-correlator.c
@@ -25,6 +25,7 @@
 
 #include <stdlib.h>
 #include <string.h>
+#include <signal.h>
 
 #include <libprelude/prelude.h>
 #include <libprelude/prelude-log.h>