diff --git a/src/EditTableDialog.cpp b/src/EditTableDialog.cpp
index f9d4b502..02a23030 100644
--- a/src/EditTableDialog.cpp
+++ b/src/EditTableDialog.cpp
@@ -142,6 +142,8 @@ EditTableDialog::EditTableDialog(DBBrowserDB& db, const sqlb::ObjectIdentifier&
 
     // (De-)activate fields
     checkInput();
+
+    ui->sqlTextEdit->setReadOnly(true);
 }
 
 EditTableDialog::~EditTableDialog()