diff --git a/lib/rouge/lexers/fsharp.rb b/lib/rouge/lexers/fsharp.rb
index 3cc91a9fb5..8640b6c485 100644
--- a/lib/rouge/lexers/fsharp.rb
+++ b/lib/rouge/lexers/fsharp.rb
@@ -113,6 +113,7 @@ def self.primitives
         rule %r/#{upper_id}(?=\s*[.])/, Name::Namespace
         rule upper_id, Name::Class, :pop!
         rule id, Name, :pop!
+        rule %r/\[/, Punctuation, :pop!
       end
     end
   end
diff --git a/spec/visual/samples/fsharp b/spec/visual/samples/fsharp
index bf361461ee..2307f9e12f 100644
--- a/spec/visual/samples/fsharp
+++ b/spec/visual/samples/fsharp
@@ -198,3 +198,9 @@ finally
     traceEndBuild()
     if !TargetHelper.ExitCode.exitCode <> 0 then exit !TargetHelper.ExitCode.exitCode
     if Environment.ExitCode <> 0 then exit Environment.ExitCode
+
+let value = array.[0]
+let value = dict.Test.["key"]
+
+// syntax highlighting
+let number = 123