diff --git a/hb.c b/hb.c
index 61fae1e..38214c2 100644
--- a/hb.c
+++ b/hb.c
@@ -2,9 +2,9 @@
 #include <stdio.h>
 #include <math.h>
 #include <X11/Xft/Xft.h>
+#include <time.h>
 #include <hb.h>
 #include <hb-ft.h>
-
 #include "st.h"
 
 void hbtransformsegment(XftFont *xfont, const Glyph *string, hb_codepoint_t *codepoints, int start, int length);