diff --git a/Core/src/org/sleuthkit/autopsy/datamodel/FileTypesByMimeType.java b/Core/src/org/sleuthkit/autopsy/datamodel/FileTypesByMimeType.java
index 2d6393b000..f0fcb90901 100644
--- a/Core/src/org/sleuthkit/autopsy/datamodel/FileTypesByMimeType.java
+++ b/Core/src/org/sleuthkit/autopsy/datamodel/FileTypesByMimeType.java
@@ -118,7 +118,7 @@ public class FileTypesByMimeType extends Observable implements AutopsyVisitableI
      */
     private void populateHashMap() {
         StringBuilder allDistinctMimeTypesQuery = new StringBuilder();
-        allDistinctMimeTypesQuery.append("SELECT DISTINCT mime_type from tsk_files where mime_type NOT null");  //NON-NLS
+        allDistinctMimeTypesQuery.append("SELECT DISTINCT mime_type from tsk_files where mime_type IS NOT null");  //NON-NLS
         allDistinctMimeTypesQuery.append(" AND dir_type = ").append(TskData.TSK_FS_NAME_TYPE_ENUM.REG.getValue()); //NON-NLS
         allDistinctMimeTypesQuery.append(" AND (type IN (").append(TskData.TSK_DB_FILES_TYPE_ENUM.FS.ordinal()).append(","); //NON-NLS
         allDistinctMimeTypesQuery.append(TskData.TSK_DB_FILES_TYPE_ENUM.CARVED.ordinal()).append(",");