diff --git a/src/dehacked.c b/src/dehacked.c
index 926c3a488..61bccb4f6 100644
--- a/src/dehacked.c
+++ b/src/dehacked.c
@@ -6711,6 +6711,7 @@ static const char *const MOBJEFLAG_LIST[] = {
 	"JUSTSTEPPEDDOWN", // used for ramp sectors
 	"VERTICALFLIP", // Vertically flip sprite/allow upside-down physics
 	"GOOWATER", // Goo water
+	"\x01", // free: 1<<7 (name un-matchable)
 	"SPRUNG", // Mobj was already sprung this tic
 	"APPLYPMOMZ", // Platform movement
 	NULL