diff --git a/javascript/extractor/src/com/semmle/js/extractor/FileExtractor.java b/javascript/extractor/src/com/semmle/js/extractor/FileExtractor.java
index 5b7317cbb9b..9c880f7490f 100644
--- a/javascript/extractor/src/com/semmle/js/extractor/FileExtractor.java
+++ b/javascript/extractor/src/com/semmle/js/extractor/FileExtractor.java
@@ -122,7 +122,7 @@ public class FileExtractor {
         }
         // for ERB files we are only interrested in `.html.erb` files
         if (FileUtil.extension(f).equalsIgnoreCase(".erb")) {
-          if (!f.getName().endsWith(".html.erb")) {
+          if (!f.getName().toLowerCase().endsWith(".html.erb")) {
             return false;
           }
         }