diff --git a/Core/src/org/sleuthkit/autopsy/modules/filetypeid/UserDefinedFileTypesManager.java b/Core/src/org/sleuthkit/autopsy/modules/filetypeid/UserDefinedFileTypesManager.java
index 125293e2f9..6ae8404c13 100644
--- a/Core/src/org/sleuthkit/autopsy/modules/filetypeid/UserDefinedFileTypesManager.java
+++ b/Core/src/org/sleuthkit/autopsy/modules/filetypeid/UserDefinedFileTypesManager.java
@@ -296,7 +296,7 @@ final class UserDefinedFileTypesManager {
      *                     types.
      */
     synchronized void setUserDefinedFileTypes(List<FileType> newFileTypes) throws UserDefinedFileTypesException {
-        String filePath = getFileTypeDefinitionsFilePath(USER_DEFINED_TYPES_XML_FILE);
+        String filePath = getFileTypeDefinitionsFilePath(USER_DEFINED_TYPES_SERIALIZATION_FILE);
         writeFileTypes(newFileTypes, filePath);
     }