diff --git a/src/modules/px4iofirmware/px4io.c b/src/modules/px4iofirmware/px4io.c
index e55b03f606..6ff641a0e9 100644
--- a/src/modules/px4iofirmware/px4io.c
+++ b/src/modules/px4iofirmware/px4io.c
@@ -374,7 +374,7 @@ user_start(int argc, char *argv[])
 	 * documented in the dev guide.
 	 *
 	 */
-	if (minfo.mxordblk < 600) {
+	if (minfo.mxordblk < 550) {
 
 		syslog(LOG_ERR, "ERR: not enough MEM");
 		bool phase = false;