diff --git a/lib/linguist/heuristics.rb b/lib/linguist/heuristics.rb
index 97c1015a..5e603f23 100644
--- a/lib/linguist/heuristics.rb
+++ b/lib/linguist/heuristics.rb
@@ -175,7 +175,7 @@ module Linguist
     disambiguate "Frege", "Forth", "Text" do |data|
       if /^(: |also |new-device|previous )/.match(data)
         Language["Forth"]
-      elsif /\s*(import|module|package|data|type) /.match(data)
+      elsif /^\s*(import|module|package|data|type) /.match(data)
         Language["Frege"]
       else
         Language["Text"]