diff --git a/lib/review/textmaker.rb b/lib/review/textmaker.rb
index 12f8c3bab..3a712fb0e 100644
--- a/lib/review/textmaker.rb
+++ b/lib/review/textmaker.rb
@@ -98,7 +98,7 @@ def execute(*args)
       end
 
       math_dir = "./#{@config['imagedir']}/_review_math_text"
-      if @config['imgmath'] && File.exist?(File.join(math_dir, '__IMGMATH_BODY__.tex'))
+      if @config['imgmath'] && File.exist?(File.join(math_dir, '__IMGMATH_BODY__.map'))
         make_math_images(math_dir)
       end
     end
diff --git a/lib/review/webmaker.rb b/lib/review/webmaker.rb
index 70cdfc18c..2b22d5139 100644
--- a/lib/review/webmaker.rb
+++ b/lib/review/webmaker.rb
@@ -118,7 +118,7 @@ def generate_html_files(yamlfile)
       copy_backmatter(@path)
 
       math_dir = "./#{@config['imagedir']}/_review_math"
-      if @config['imgmath'] && File.exist?("#{math_dir}/__IMGMATH_BODY__.tex")
+      if @config['imgmath'] && File.exist?("#{math_dir}/__IMGMATH_BODY__.map")
         make_math_images(math_dir)
       end