diff --git a/Core/src/org/sleuthkit/autopsy/commonfilesearch/CommonFilesMetadataBuilder.java b/Core/src/org/sleuthkit/autopsy/commonfilesearch/CommonFilesMetadataBuilder.java
index 1646f2c97b..6c51911789 100644
--- a/Core/src/org/sleuthkit/autopsy/commonfilesearch/CommonFilesMetadataBuilder.java
+++ b/Core/src/org/sleuthkit/autopsy/commonfilesearch/CommonFilesMetadataBuilder.java
@@ -225,7 +225,7 @@ abstract class CommonFilesMetadataBuilder {
         StringBuilder mimeTypeFilter = new StringBuilder(mimeTypesToFilterOn.size());
         if (!mimeTypesToFilterOn.isEmpty()) {
             for (String mimeType : mimeTypesToFilterOn) {
-                mimeTypeFilter.append('"').append(mimeType).append("\",");
+                mimeTypeFilter.append("'").append(mimeType).append("',");
             }
             mimeTypeString = mimeTypeFilter.toString().substring(0, mimeTypeFilter.length() - 1);
             mimeTypeString = String.format(filterByMimeTypesWhereClause, new Object[]{mimeTypeString});