diff --git a/libsrc/common/fseek.c b/libsrc/common/fseek.c
index b54221f89..62d435e02 100644
--- a/libsrc/common/fseek.c
+++ b/libsrc/common/fseek.c
@@ -7,7 +7,7 @@
 
 #include <stdio.h>
 #include <errno.h>
-#include <fcntl.h>
+#include <unistd.h>
 #include "_file.h"