diff --git a/src/vmime/net/imap/IMAPMessage.cpp b/src/vmime/net/imap/IMAPMessage.cpp
index 7f155469..a6ec7140 100644
--- a/src/vmime/net/imap/IMAPMessage.cpp
+++ b/src/vmime/net/imap/IMAPMessage.cpp
@@ -243,7 +243,7 @@ void IMAPMessage::extract(
 	shared_ptr <const IMAPFolder> folder = m_folder.lock();
 
 	if (!folder) {
-		throw exceptions::illegal_state("Folder not open");
+		throw exceptions::folder_not_found();
 	}
 
 	extractImpl(