diff --git a/modules/completion/corfu/config.el b/modules/completion/corfu/config.el
index 46be4ad0f..611c3bc82 100644
--- a/modules/completion/corfu/config.el
+++ b/modules/completion/corfu/config.el
@@ -140,7 +140,7 @@ TAB/S-TAB.")
       (setq dabbrev-friend-buffer-function #'+dabbrev-friend-buffer-p
             dabbrev-ignored-buffer-regexps
             '("\\` "
-              "\\(TAGS\\|tags\\|ETAGS\\|etags\\|GTAGS\\|GRTAGS\\|GPATH\\)\\(<[0-9]+>\\)?")
+              "\\(?:\\(?:[EG]?\\|GR\\)TAGS\\|e?tags\\|GPATH\\)\\(<[0-9]+>\\)?")
             dabbrev-upcase-means-case-search t)
       (add-to-list 'dabbrev-ignored-buffer-modes 'pdf-view-mode)
       (add-to-list 'dabbrev-ignored-buffer-modes 'doc-view-mode)