diff --git a/tests/timeout.c b/tests/timeout.c
index 13d73dcb..d1a9491e 100644
--- a/tests/timeout.c
+++ b/tests/timeout.c
@@ -30,6 +30,7 @@
 #include <glad/glad.h>
 #include <GLFW/glfw3.h>
 
+#include <time.h>
 #include <math.h>
 #include <stdio.h>
 #include <stdlib.h>