diff --git a/aplay/aplay.c b/aplay/aplay.c
index 5cbab93..5eaacd3 100644
--- a/aplay/aplay.c
+++ b/aplay/aplay.c
@@ -818,6 +818,18 @@ static void set_params(void)
 	// fprintf(stderr, "real chunk_size = %i, frags = %i, total = %i\n", chunk_size, setup.buf.block.frags, setup.buf.block.frags * chunk_size);
 }
 
+#ifndef timersub
+#define	timersub(a, b, result) \
+do { \
+	(result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
+	(result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
+	if ((result)->tv_usec < 0) { \
+		--(result)->tv_sec; \
+		(result)->tv_usec += 1000000; \
+	} \
+} while (0)
+#endif
+
 /* playback write error hander */
 
 void xrun(void)