diff --git a/src/Text/Pandoc/Writers/Muse.hs b/src/Text/Pandoc/Writers/Muse.hs
index 8963c7ce4..a6ef28ba7 100644
--- a/src/Text/Pandoc/Writers/Muse.hs
+++ b/src/Text/Pandoc/Writers/Muse.hs
@@ -285,7 +285,7 @@ escapeString s =
 -- | Escape special characters for Muse if needed.
 conditionalEscapeString :: String -> String
 conditionalEscapeString s =
-  if any (`elem` ("*<=>[]|" :: String)) s ||
+  if any (`elem` ("#*<=>[]|" :: String)) s ||
      "::" `isInfixOf` s ||
      "----" `isInfixOf` s
     then escapeString s
diff --git a/test/Tests/Writers/Muse.hs b/test/Tests/Writers/Muse.hs
index a19f2f57e..562cccfe5 100644
--- a/test/Tests/Writers/Muse.hs
+++ b/test/Tests/Writers/Muse.hs
@@ -279,6 +279,8 @@ tests = [ testGroup "block elements"
                =?> "<verbatim>foo<</verbatim><verbatim>/verbatim>bar</verbatim>"
             , "escape pipe to avoid accidental tables" =: str "foo | bar"
                =?> "<verbatim>foo | bar</verbatim>"
+            , "escape hash to avoid accidental anchors" =: text "#foo bar"
+              =?> "<verbatim>#foo</verbatim> bar"
             , "escape definition list markers" =: str "::" =?> "<verbatim>::</verbatim>"
             -- We don't want colons to be escaped if they can't be confused
             -- with definition list item markers.
diff --git a/test/writer.muse b/test/writer.muse
index 6c9dd9869..db34a2733 100644
--- a/test/writer.muse
+++ b/test/writer.muse
@@ -589,7 +589,7 @@ Right paren: )
 
 Greater-than: <verbatim>></verbatim>
 
-Hash: #
+Hash: <verbatim>#</verbatim>
 
 Period: .