diff --git a/lib/redmine/scm/adapters/mercurial/redminehelper.py b/lib/redmine/scm/adapters/mercurial/redminehelper.py
index 3e82e95f7..7b3b639f2 100644
--- a/lib/redmine/scm/adapters/mercurial/redminehelper.py
+++ b/lib/redmine/scm/adapters/mercurial/redminehelper.py
@@ -120,9 +120,13 @@ def _manifest(ui, repo, path, rev):
     ui.write('</manifest>\n')
 
 def rhannotate(ui, repo, *pats, **opts):
+    rev = urllib.unquote_plus(opts.pop('rev', None))
+    opts['rev'] = rev
     return commands.annotate(ui, repo, *map(urllib.unquote_plus, pats), **opts)
 
 def rhcat(ui, repo, file1, *pats, **opts):
+    rev = urllib.unquote_plus(opts.pop('rev', None))
+    opts['rev'] = rev
     return commands.cat(ui, repo, urllib.unquote_plus(file1), *map(urllib.unquote_plus, pats), **opts)
 
 def rhdiff(ui, repo, *pats, **opts):
diff --git a/lib/redmine/scm/adapters/mercurial_adapter.rb b/lib/redmine/scm/adapters/mercurial_adapter.rb
index d5266e9bf..f39b397a2 100644
--- a/lib/redmine/scm/adapters/mercurial_adapter.rb
+++ b/lib/redmine/scm/adapters/mercurial_adapter.rb
@@ -252,7 +252,7 @@ module Redmine
 
         def cat(path, identifier=nil)
           p = CGI.escape(scm_iconv(@path_encoding, 'UTF-8', path))
-          hg 'rhcat', '-r', hgrev(identifier), hgtarget(p) do |io|
+          hg 'rhcat', '-r', CGI.escape(hgrev(identifier)), hgtarget(p) do |io|
             io.binmode
             io.read
           end
@@ -263,7 +263,7 @@ module Redmine
         def annotate(path, identifier=nil)
           p = CGI.escape(scm_iconv(@path_encoding, 'UTF-8', path))
           blame = Annotate.new
-          hg 'rhannotate', '-ncu', '-r', hgrev(identifier), hgtarget(p) do |io|
+          hg 'rhannotate', '-ncu', '-r', CGI.escape(hgrev(identifier)), hgtarget(p) do |io|
             io.each_line do |line|
               line.force_encoding('ASCII-8BIT') if line.respond_to?(:force_encoding)
               next unless line =~ %r{^([^:]+)\s(\d+)\s([0-9a-f]+):\s(.*)$}