diff --git a/Core/src/org/sleuthkit/autopsy/modules/hashdatabase/HashDbManager.java b/Core/src/org/sleuthkit/autopsy/modules/hashdatabase/HashDbManager.java
index 67f98292c5..7c58e41856 100755
--- a/Core/src/org/sleuthkit/autopsy/modules/hashdatabase/HashDbManager.java
+++ b/Core/src/org/sleuthkit/autopsy/modules/hashdatabase/HashDbManager.java
@@ -138,7 +138,7 @@ public class HashDbManager implements PropertyChangeListener {
      *
      * @throws HashDbManagerException
      */
-    public HashDb addExistingHashDatabase(String hashSetName, String path, boolean searchDuringIngest, boolean sendIngestMessages, HashDb.KnownFilesType knownFilesType) throws HashDbManagerException {
+    public synchronized HashDb addExistingHashDatabase(String hashSetName, String path, boolean searchDuringIngest, boolean sendIngestMessages, HashDb.KnownFilesType knownFilesType) throws HashDbManagerException {
         HashDb hashDb = null;
         try {
             if (!new File(path).exists()) {
@@ -188,7 +188,7 @@ public class HashDbManager implements PropertyChangeListener {
      *
      * @throws HashDbManagerException
      */
-    public HashDb addNewHashDatabase(String hashSetName, String path, boolean searchDuringIngest, boolean sendIngestMessages,
+    public synchronized HashDb addNewHashDatabase(String hashSetName, String path, boolean searchDuringIngest, boolean sendIngestMessages,
             HashDb.KnownFilesType knownFilesType) throws HashDbManagerException {
 
         HashDb hashDb = null;