1 files changed, 3 insertions, 0 deletions

diff --git a/st.c b/st.c
index ae93ade..8d4a9f2 100644
--- a/st.c
+++ b/st.c
@@ -1402,6 +1402,9 @@ tsetattr(int *attr, int l)
                 case 9:
                         term.c.attr.mode |= ATTR_STRUCK;
                         break;
+                case 21:
+                        term.c.attr.mode &= ~ATTR_BOLD;
+                        break;
                 case 22:
                         term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
                         break;