diff --git a/src/java/davmail/imap/ImapConnection.java b/src/java/davmail/imap/ImapConnection.java
index 7eba22d9..13454b39 100644
--- a/src/java/davmail/imap/ImapConnection.java
+++ b/src/java/davmail/imap/ImapConnection.java
@@ -503,7 +503,7 @@ public class ImapConnection extends AbstractConnection {
                 }
                 buffer.append(" RFC822.SIZE ").append(rfc822size).append(" ").append("BODY[]");
                 // partial
-                if (ltIndex >= 0) {
+                if (startIndex > 0) {
                     buffer.append('<').append(startIndex).append('>');
                 }
                 buffer.append(" {").append(baos.size()).append("}");