diff --git a/lib/searchkick.rb b/lib/searchkick.rb
index 2760057..1dea46a 100644
--- a/lib/searchkick.rb
+++ b/lib/searchkick.rb
@@ -192,6 +192,10 @@ module Searchkick
     end
   end
 
+  def self.warn(message)
+    warn "[searchkick] WARNING: #{message}"
+  end
+
   # private
   def self.load_records(records, ids)
     records =
diff --git a/lib/searchkick/query.rb b/lib/searchkick/query.rb
index 71364f0..44812aa 100644
--- a/lib/searchkick/query.rb
+++ b/lib/searchkick/query.rb
@@ -432,7 +432,7 @@ module Searchkick
 
         models = Array(options[:models])
         if models.any? { |m| m != m.searchkick_klass }
-          warn "[searchkick] WARNING: Passing child models to models option throws off hits and pagination - use type option instead"
+          Searchkick.warn("Passing child models to models option throws off hits and pagination - use type option instead")
 
           # uncomment once aliases are supported with _index
           # see https://github.com/elastic/elasticsearch/issues/23306
@@ -986,13 +986,13 @@ module Searchkick
         {bool: {must_not: {exists: {field: field}}}}
       elsif value.is_a?(Regexp)
         if value.casefold?
-          warn "[searchkick] Case-insensitive flag does not work with Elasticsearch"
+          Searchkick.warn("Case-insensitive flag does not work with Elasticsearch")
         end
 
         source = value.source
         unless source.start_with?("\\A") && source.end_with?("\\z")
           # https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-regexp-query.html
-          warn "[searchkick] Regular expressions are always anchored in Elasticsearch"
+          Searchkick.warn("Regular expressions are always anchored in Elasticsearch")
         end
 
         # TODO handle other anchor characters, like ^, $, \Z
diff --git a/lib/searchkick/results.rb b/lib/searchkick/results.rb
index f78ae84..7c5a81e 100644
--- a/lib/searchkick/results.rb
+++ b/lib/searchkick/results.rb
@@ -62,7 +62,7 @@ module Searchkick
             end
 
           if missing_ids.any?
-            warn "[searchkick] WARNING: Records in search index do not exist in database: #{missing_ids.join(", ")}"
+            Searchkick.warn("Records in search index do not exist in database: #{missing_ids.join(", ")}")
           end
 
           results
--
libgit2 0.21.0