diff --git a/src/mojitos.c b/src/mojitos.c
index 7c721cd421f3b255a92376ce89ddf5f46c420415..7d1d8d3cf0a13070867235faf72434e077066645 100644
--- a/src/mojitos.c
+++ b/src/mojitos.c
@@ -168,7 +168,7 @@ unsigned int nb_sensors = 0;
 char **labels = NULL;
 uint64_t *values = NULL;
 
-void flushexit()
+void flushexit(void)
 {
     if (output != NULL) {
         fflush(output);