diff --git a/equi.c b/equi.c
index 71c479e..ed64a1f 100644
--- a/equi.c
+++ b/equi.c
@@ -14,6 +14,7 @@
 #ifdef __TINYC__
 #include <tcclib.h>
 #define stderr 2
+#define SEEK_SET 0
 #else
 #include <stdlib.h>
 #include <stdio.h>