diff --git a/lib/loofah.rb b/lib/loofah.rb
index 5dbd2ec..20d3f33 100644
--- a/lib/loofah.rb
+++ b/lib/loofah.rb
@@ -7,14 +7,12 @@ class << self
     def html5_support?
       # Note that Loofah can only support HTML5 in Nokogiri >= 1.14.0 because it requires the
       # subclassing fix from https://github.com/sparklemotion/nokogiri/pull/2534
-      unless @html5_support_set
-        @html5_support = (
-          Gem::Version.new(Nokogiri::VERSION) > Gem::Version.new("1.14.0") &&
+      return @html5_support if defined? @html5_support
+      
+      @html5_support = (
+        Gem::Version.new(Nokogiri::VERSION) > Gem::Version.new("1.14.0") &&
           Nokogiri.uses_gumbo?
-        )
-        @html5_support_set = true
-      end
-      @html5_support
+      )
     end
   end
 end