diff --git a/lib/noosfero/core_ext/string.rb b/lib/noosfero/core_ext/string.rb
index 5c71347..94abad4 100644
--- a/lib/noosfero/core_ext/string.rb
+++ b/lib/noosfero/core_ext/string.rb
@@ -37,7 +37,7 @@ class String
   end
 
   def to_slug
-    transliterate.downcase.gsub(/^\d+/,'').gsub( /[^a-z0-9~\s:;+=_."'`-]/, '').gsub(/[\s:;+=_"'`-]+/, '-').gsub(/-$/, '').gsub(/^-/, '').to_s
+    transliterate.downcase.gsub(/[^a-z0-9~\s:;+=_."'`-]/, '').gsub(/[\s:;+=_"'`-]+/, '-').gsub(/-$/, '').gsub(/^-/, '').to_s
   end
 
 end
diff --git a/test/unit/slug_test.rb b/test/unit/slug_test.rb
index 427b9f2..71ba1cf 100644
--- a/test/unit/slug_test.rb
+++ b/test/unit/slug_test.rb
@@ -7,7 +7,7 @@ class SlugTest < Test::Unit::TestCase
     assert_equal 'abc', 'abc!)@(*#&@!*#*)'.to_slug
   end
 
-  should 'turn punctuation into dashes' do
+  should 'turn punctuation into s' do
     assert_equal 'a-b-c-d-e-f', 'a:b;c+d=e_f'.to_slug
   end
 
@@ -27,4 +27,9 @@ class SlugTest < Test::Unit::TestCase
     assert_equal 'a-b-c-d', 'a"b\'c`d'.to_slug
   end
 
+  should 'not remove numbers in beginning of slug' do
+    assert_equal '3-times', '3 times'.to_slug
+    assert_equal '3x640.jpg', '3x640.jpg'.to_slug
+  end
+
 end
--
libgit2 0.21.2