diff --git a/lib/ssh.h b/lib/ssh.h
index ec711fbe9380b8ed1f093feb0feec9e5f030a18a..00fe7173e0a7ddbdf7fed4c9de2c98098cdb3e16 100644
--- a/lib/ssh.h
+++ b/lib/ssh.h
@@ -44,7 +44,7 @@
    later */
 #  define HAVE_LIBSSH2_SFTP_SEEK64 1
 #else
-#  undef HAVE_LIBSSH2_SFTP_SEEK64 1
+#  undef HAVE_LIBSSH2_SFTP_SEEK64
 #endif