1 files changed, 1 insertions, 0 deletions
diff --git a/median.c b/median.c
index 693b8fd..b02e17a 100644
--- a/median.c
+++ b/median.c
@@ -5,6 +5,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 #if defined(__GNUC__)
 # define PURE __attribute__((__pure__))