neovim
diff --git a/‎src/nvim/tui/tui.c
Copy file name to clipboardExpand all lines: src/nvim/tui/tui.c
+2Lines changed: 2 additions & 0 deletions b/‎src/nvim/tui/tui.c
Copy file name to clipboardExpand all lines: src/nvim/tui/tui.c
+2Lines changed: 2 additions & 0 deletions
@@ -1607,6 +1607,8 @@ static void patch_terminfo_bugs(TUIData *data, const char *term,
   } else if (tmux) {
     unibi_set_if_empty(ut, unibi_to_status_line, "\x1b_");
     unibi_set_if_empty(ut, unibi_from_status_line, "\x1b\\");
+    unibi_set_if_empty(ut, unibi_enter_italics_mode, "\x1b[3m");
+    unibi_set_if_empty(ut, unibi_exit_italics_mode, "\x1b[23m");
   } else if (terminfo_is_term_family(term, "interix")) {
     // 2017-04 terminfo.src lacks this.
     unibi_set_if_empty(ut, unibi_carriage_return, "\x0d");