diff --git a/lib/redmine/scm/adapters/bazaar_adapter.rb b/lib/redmine/scm/adapters/bazaar_adapter.rb
index 8bfa2bf25..92a1d693d 100644
--- a/lib/redmine/scm/adapters/bazaar_adapter.rb
+++ b/lib/redmine/scm/adapters/bazaar_adapter.rb
@@ -44,6 +44,9 @@ module Redmine
 
           def scm_command_version
             scm_version = scm_version_from_command_line
+            if scm_version.respond_to?(:force_encoding)
+              scm_version.force_encoding('ASCII-8BIT')
+            end
             if m = scm_version.match(%r{\A(.*?)((\d+\.)+\d+)})
               m[2].scan(%r{\d+}).collect(&:to_i)
             end
diff --git a/lib/redmine/scm/adapters/cvs_adapter.rb b/lib/redmine/scm/adapters/cvs_adapter.rb
index 6ce10e383..365d44041 100644
--- a/lib/redmine/scm/adapters/cvs_adapter.rb
+++ b/lib/redmine/scm/adapters/cvs_adapter.rb
@@ -44,6 +44,9 @@ module Redmine
 
           def scm_command_version
             scm_version = scm_version_from_command_line
+            if scm_version.respond_to?(:force_encoding)
+              scm_version.force_encoding('ASCII-8BIT')
+            end
             if m = scm_version.match(%r{\A(.*?)((\d+\.)+\d+)}m)
               m[2].scan(%r{\d+}).collect(&:to_i)
             end
diff --git a/lib/redmine/scm/adapters/darcs_adapter.rb b/lib/redmine/scm/adapters/darcs_adapter.rb
index 0ed7e9637..279d503f0 100644
--- a/lib/redmine/scm/adapters/darcs_adapter.rb
+++ b/lib/redmine/scm/adapters/darcs_adapter.rb
@@ -44,6 +44,9 @@ module Redmine
 
           def darcs_binary_version
             darcsversion = darcs_binary_version_from_command_line
+            if darcsversion.respond_to?(:force_encoding)
+              darcsversion.force_encoding('ASCII-8BIT')
+            end
             if m = darcsversion.match(%r{\A(.*?)((\d+\.)+\d+)})
               m[2].scan(%r{\d+}).collect(&:to_i)
             end
diff --git a/lib/redmine/scm/adapters/git_adapter.rb b/lib/redmine/scm/adapters/git_adapter.rb
index 7d742235c..326b7bf64 100644
--- a/lib/redmine/scm/adapters/git_adapter.rb
+++ b/lib/redmine/scm/adapters/git_adapter.rb
@@ -46,6 +46,9 @@ module Redmine
 
           def scm_command_version
             scm_version = scm_version_from_command_line
+            if scm_version.respond_to?(:force_encoding)
+              scm_version.force_encoding('ASCII-8BIT')
+            end
             if m = scm_version.match(%r{\A(.*?)((\d+\.)+\d+)})
               m[2].scan(%r{\d+}).collect(&:to_i)
             end
diff --git a/lib/redmine/scm/adapters/mercurial_adapter.rb b/lib/redmine/scm/adapters/mercurial_adapter.rb
index 5bcb33ea5..e8c5fe883 100644
--- a/lib/redmine/scm/adapters/mercurial_adapter.rb
+++ b/lib/redmine/scm/adapters/mercurial_adapter.rb
@@ -55,6 +55,9 @@ module Redmine
             # release number (eg 0.9.5 or 1.0) or as a revision
             # id composed of 12 hexa characters.
             theversion = hgversion_from_command_line
+            if theversion.respond_to?(:force_encoding)
+              theversion.force_encoding('ASCII-8BIT')
+            end
             if m = theversion.match(%r{\A(.*?)((\d+\.)+\d+)})
               m[2].scan(%r{\d+}).collect(&:to_i)
             end
diff --git a/lib/redmine/scm/adapters/subversion_adapter.rb b/lib/redmine/scm/adapters/subversion_adapter.rb
index 37d5bcf4d..9f1ccf7ac 100644
--- a/lib/redmine/scm/adapters/subversion_adapter.rb
+++ b/lib/redmine/scm/adapters/subversion_adapter.rb
@@ -45,6 +45,9 @@ module Redmine
 
           def svn_binary_version
             scm_version = scm_version_from_command_line
+            if scm_version.respond_to?(:force_encoding)
+              scm_version.force_encoding('ASCII-8BIT')
+            end
             if m = scm_version.match(%r{\A(.*?)((\d+\.)+\d+)})
               m[2].scan(%r{\d+}).collect(&:to_i)
             end