diff --git a/activestorage/lib/active_storage/previewer/poppler_pdf_previewer.rb b/activestorage/lib/active_storage/previewer/poppler_pdf_previewer.rb
index 69eb617d7b..6bf501a607 100644
--- a/activestorage/lib/active_storage/previewer/poppler_pdf_previewer.rb
+++ b/activestorage/lib/active_storage/previewer/poppler_pdf_previewer.rb
@@ -28,7 +28,7 @@ module ActiveStorage
 
     private
       def draw_first_page_from(file, &block)
-        # use 72 dpi to match thumbnail  dimesions of the PDF
+        # use 72 dpi to match thumbnail dimensions of the PDF
         draw self.class.pdftoppm_path, "-singlefile", "-r", "72", "-png", file.path, &block
       end
   end