diff --git a/contrib/lisp/org-export.el b/contrib/lisp/org-export.el
index 0d7dbf7c7..fd67707e2 100644
--- a/contrib/lisp/org-export.el
+++ b/contrib/lisp/org-export.el
@@ -3349,7 +3349,7 @@ INFO is a plist used as a communication channel."
 (defun org-export-solidify-link-text (s)
   "Take link text S and make a safe target out of it."
   (save-match-data
-    (mapconcat 'identity (org-split-string s "[^a-zA-Z0-9_.-]+") "-")))
+    (mapconcat 'identity (org-split-string s "[^a-zA-Z0-9_.-:]+") "-")))
 
 (defun org-export-get-coderef-format (path desc)
   "Return format string for code reference link.