diff --git a/src/main/java/tm/TMFileResources.java b/src/main/java/tm/TMFileResources.java
index 8fb80b5..8ce71a0 100644
--- a/src/main/java/tm/TMFileResources.java
+++ b/src/main/java/tm/TMFileResources.java
@@ -281,7 +281,7 @@ public FolderNode getPalettesRoot() {
 	public String toXML() {
 		StringBuffer sb = new StringBuffer();
 		sb.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
-		sb.append("<!DOCTYPE tmres SYSTEM \"resources\\tmres.dtd\">\n");
+		sb.append("<!DOCTYPE tmres SYSTEM \"resources" + File.separatorChar + "tmres.dtd\">\n");
 		sb.append("<tmres>\n");
 
 		sb.append(bookmarksToXML());