1 files changed, 1 insertions, 0 deletions
diff --git a/vis.h b/vis.h
index 8dee46b..2834fbd 100644
--- a/vis.h
+++ b/vis.h
@@ -350,6 +350,7 @@ enum VisRegister {
 	VIS_REG_u, VIS_REG_v, VIS_REG_w, VIS_REG_x, VIS_REG_y,
 	VIS_REG_z,
 	VIS_REG_DEFAULT, /* used when no other register is specified */
+	VIS_REG_PROMPT,  /* internal register which shadows DEFAULT in PROMPT mode */
 	VIS_REG_INVALID, /* has to be the last enum member */
 };