diff --git a/chrome/content/zotero/tools/csledit.xul b/chrome/content/zotero/tools/csledit.xul
index 376dbf6cd..5dd1f0a3f 100644
--- a/chrome/content/zotero/tools/csledit.xul
+++ b/chrome/content/zotero/tools/csledit.xul
@@ -186,7 +186,7 @@
 			onkeypress="Zotero_CSL_Editor.handleKeyPress(event)"
 			oncommand="document.getElementById('zotero-csl-list').selectedIndex = -1; Zotero_CSL_Editor.generateBibliography(this.value)"/>
 		<splitter/>
-		<iframe id="zotero-csl-preview-box" flex="1" style="padding: 0 1em;background:white" overflow="auto"/>
+		<iframe id="zotero-csl-preview-box" flex="1" style="padding: 0 1em;background:white" overflow="auto" type="content"/>
 	</vbox>
 	
 </window>
diff --git a/chrome/content/zotero/tools/cslpreview.xul b/chrome/content/zotero/tools/cslpreview.xul
index a2f7a9ae4..879b0eac6 100644
--- a/chrome/content/zotero/tools/cslpreview.xul
+++ b/chrome/content/zotero/tools/cslpreview.xul
@@ -156,7 +156,7 @@
 		</hbox>
 	   </hbox>
 	   <splitter/>
-	   <iframe id="zotero-csl-preview-box" flex="1" style="padding: 0 1em; background:white;" overflow="auto"/>
+	   <iframe id="zotero-csl-preview-box" flex="1" style="padding: 0 1em; background:white;" overflow="auto" type="content"/>
 	</vbox>
 	
 </window>