diff --git a/lib/db_key.cpp b/lib/db_key.cpp
index c7bf1ee5..8078618f 100644
--- a/lib/db_key.cpp
+++ b/lib/db_key.cpp
@@ -122,10 +122,13 @@ pki_base* db_key::insert(pki_base *item)
 			tr("The key is already in the database as:\n'%1'\nand is not going to be imported").arg(oldkey->getIntName()));
 			delete(lkey);
 			return NULL;
-		}
-		else {
+		} else {
 			XCA_INFO(
 			tr("The database already contains the public part of the imported key as\n'%1\nand will be completed by the new, private part of the key").arg(oldkey->getIntName()));
+			lkey->setComment(oldkey->getComment() + "\n" +
+				tr("Extending public key from %1 by %2")
+				.arg(oldkey->getInsertionDate().toPretty())
+				.arg(lkey->getIntName()));
 			lkey->setIntName(oldkey->getIntName());
 			deletePKI(index(oldkey->row(), 0, QModelIndex()));
 		}