diff --git a/src/core/Cutter.cpp b/src/core/Cutter.cpp
index d2596bb8..e303f66c 100644
--- a/src/core/Cutter.cpp
+++ b/src/core/Cutter.cpp
@@ -2647,6 +2647,7 @@ QString CutterCore::bytesToHexString(const QByteArray &bytes)
 
 void CutterCore::loadScript(const QString &scriptname)
 {
+    CORE_LOCK();
     r_core_task_sync_begin(core_);
     r_core_cmd_file(core_, scriptname.toUtf8().constData());
     r_core_task_sync_end(core_);