diff --git a/main/webapp/modules/core/langs/translation-en.json b/main/webapp/modules/core/langs/translation-en.json
index df91b71ea..08a1ca6bf 100644
--- a/main/webapp/modules/core/langs/translation-en.json
+++ b/main/webapp/modules/core/langs/translation-en.json
@@ -69,6 +69,7 @@
     "core-index-import/unknown-err": "Unknown error",
     "core-index-import/error": "Error:",
     "core-index-import/select-file": "Select Files to Import",
+    "core-index-import/single-project": "OpenRefine can only import multiple files into a single project if all selected files have the same file format.",
     "core-index-import/several-file": "There are several files available. Please select the ones to import.",
     "core-index-import/sel-by-extension": "Select by Extension",
     "core-index-import/sel-by-regex": "Select by Regex on File Names",
diff --git a/main/webapp/modules/core/scripts/index/default-importing-controller/file-selection-panel.html b/main/webapp/modules/core/scripts/index/default-importing-controller/file-selection-panel.html
index 2d5dc9e37..ab466f5c6 100644
--- a/main/webapp/modules/core/scripts/index/default-importing-controller/file-selection-panel.html
+++ b/main/webapp/modules/core/scripts/index/default-importing-controller/file-selection-panel.html
@@ -6,6 +6,9 @@
 
 <div bind="controlPanel" class="default-importing-file-selection-control-panel">
   <div class="grid-layout layout-full layout-tighter"><table>
+    <tr>
+      <td colspan="3" id="or-import-singleProject"></td>
+    </tr>
     <tr>
       <td colspan="3" id="or-import-severalFile"></td>
     </tr>
diff --git a/main/webapp/modules/core/scripts/index/default-importing-controller/file-selection-panel.js b/main/webapp/modules/core/scripts/index/default-importing-controller/file-selection-panel.js
index c5c69f709..4251cb143 100644
--- a/main/webapp/modules/core/scripts/index/default-importing-controller/file-selection-panel.js
+++ b/main/webapp/modules/core/scripts/index/default-importing-controller/file-selection-panel.js
@@ -60,6 +60,7 @@ Refine.DefaultImportingController.prototype._prepareFileSelectionPanel = functio
   this._fileSelectionPanelElmts = DOM.bind(this._fileSelectionPanel);
   
   $('#or-import-select').text($.i18n('core-index-import/select-file'));
+  $('#or-import-singleProject').text($.i18n('core-index-import/single-project'));
   $('#or-import-severalFile').text($.i18n('core-index-import/several-file'));
   $('#or-import-selExt').text($.i18n('core-index-import/sel-by-extension'));
   $('#or-import-regex').text($.i18n('core-index-import/sel-by-regex'));