diff --git a/demo/common/overview.c b/demo/common/overview.c
index 5ce339f..f4c936a 100644
--- a/demo/common/overview.c
+++ b/demo/common/overview.c
@@ -1,3 +1,5 @@
+#include <time.h>
+
 static int
 overview(struct nk_context *ctx)
 {