1 files changed, 1 insertions, 0 deletions
diff --git a/uptime.c b/uptime.c
index b827f7e..4463b94 100644
--- a/uptime.c
+++ b/uptime.c
@@ -32,6 +32,7 @@
 #include <stdio.h>
 #include <time.h>
 #include <errno.h>
+#include <stdlib.h>
 
 static const int FSHIFT = 16;              /* nr of bits of precision */
 #define FIXED_1         (1<<FSHIFT)     /* 1.0 as fixed-point */