diff --git a/src/main/java/org/qortal/api/HTMLParser.java b/src/main/java/org/qortal/api/HTMLParser.java
index 9e7bb2d2..3339ffd3 100644
--- a/src/main/java/org/qortal/api/HTMLParser.java
+++ b/src/main/java/org/qortal/api/HTMLParser.java
@@ -21,7 +21,7 @@ public class HTMLParser {
 
     public HTMLParser(String resourceId, String inPath, String prefix, boolean usePrefix, byte[] data,
                       String qdnContext, Service service, String identifier) {
-        String inPathWithoutFilename = inPath.substring(0, inPath.lastIndexOf('/'));
+        String inPathWithoutFilename = inPath.contains("/") ? inPath.substring(0, inPath.lastIndexOf('/')) : "";
         this.linkPrefix = usePrefix ? String.format("%s/%s%s", prefix, resourceId, inPathWithoutFilename) : "";
         this.data = data;
         this.qdnContext = qdnContext;