diff --git a/tika-app/src/main/java/org/apache/tika/gui/TikaGUI.java b/tika-app/src/main/java/org/apache/tika/gui/TikaGUI.java
index 6b1e6596673..30c02beedb5 100644
--- a/tika-app/src/main/java/org/apache/tika/gui/TikaGUI.java
+++ b/tika-app/src/main/java/org/apache/tika/gui/TikaGUI.java
@@ -615,7 +615,7 @@ public File requestSave(String embeddedName) throws IOException {
 
             int splitAt = embeddedName.lastIndexOf('.');
             if (splitAt > 0) {
-                embeddedName.substring(splitAt);
+                embeddedName = embeddedName.substring(splitAt);
             }
 
             File tmp = Files