diff --git a/Library/Homebrew/livecheck/strategy/page_match.rb b/Library/Homebrew/livecheck/strategy/page_match.rb
index 7022be6739..344abae816 100644
--- a/Library/Homebrew/livecheck/strategy/page_match.rb
+++ b/Library/Homebrew/livecheck/strategy/page_match.rb
@@ -88,7 +88,7 @@ module Homebrew
         def self.find_versions(url, regex, provided_content = nil, &block)
           match_data = { matches: {}, regex: regex, url: url }
 
-          content = if provided_content.present?
+          content = if provided_content.is_a?(String)
             provided_content
           else
             match_data.merge!(Strategy.page_content(url))