diff --git a/fine-itext-old/src/main/java/com/fr/third/com/lowagie/text/xml/simpleparser/SimpleXMLParser.java b/fine-itext-old/src/main/java/com/fr/third/com/lowagie/text/xml/simpleparser/SimpleXMLParser.java
index e2873f902..3bfbcf761 100644
--- a/fine-itext-old/src/main/java/com/fr/third/com/lowagie/text/xml/simpleparser/SimpleXMLParser.java
+++ b/fine-itext-old/src/main/java/com/fr/third/com/lowagie/text/xml/simpleparser/SimpleXMLParser.java
@@ -506,7 +506,7 @@ public final class SimpleXMLParser {
         if (c == -1) {
             return;
         }
-        if (c == '/' || HTMLWorker.tagsPrefixSupported.containsKey(c)) {
+        if (c == '/' || HTMLWorker.tagsPrefixSupported.containsKey(Character.toLowerCase(c))) {
             if (type == TEXT) {
                 flush();
             }