diff --git a/src/EditIndexDialog.cpp b/src/EditIndexDialog.cpp
index 8c8ed760..d1155bdd 100644
--- a/src/EditIndexDialog.cpp
+++ b/src/EditIndexDialog.cpp
@@ -16,6 +16,7 @@ EditIndexDialog::EditIndexDialog(DBBrowserDB& db, const sqlb::ObjectIdentifier&
 {
     // Create UI
     ui->setupUi(this);
+    ui->sqlTextEdit->setReadOnly(true);
 
     // Get list of tables, sort it alphabetically and fill the combobox
     QMap<QString, sqlb::ObjectIdentifier> dbobjs;  // Map from display name to full object identifier