diff --git a/lib/rouge/lexers/ini.rb b/lib/rouge/lexers/ini.rb
index 500167e2c3..60ad77c8c7 100644
--- a/lib/rouge/lexers/ini.rb
+++ b/lib/rouge/lexers/ini.rb
@@ -15,7 +15,7 @@ class INI < RegexLexer
 
       state :basic do
         rule %r/\s+/, Text::Whitespace
-        rule %r/[;#].*?\n/, Comment
+        rule %r/^[ \t]*[;#][^\n]*(?=\n|\z)/, Comment
         rule %r/\\\n/, Str::Escape
       end