diff --git a/python/PyQt6/core/auto_generated/geometry/qgsgeometry.sip.in b/python/PyQt6/core/auto_generated/geometry/qgsgeometry.sip.in
index a3100f718881..8533371eb880 100644
--- a/python/PyQt6/core/auto_generated/geometry/qgsgeometry.sip.in
+++ b/python/PyQt6/core/auto_generated/geometry/qgsgeometry.sip.in
@@ -313,7 +313,7 @@ Returns type of the geometry as a :py:class:`Qgis`.GeometryType
 .. seealso:: :py:func:`wkbType`
 %End
 
-    bool isEmpty() const;
+    bool isEmpty() const /HoldGIL/;
 %Docstring
 Returns ``True`` if the geometry is empty (eg a linestring with no vertices,
 or a collection with no geometries). A null geometry will always
diff --git a/python/core/auto_generated/geometry/qgsgeometry.sip.in b/python/core/auto_generated/geometry/qgsgeometry.sip.in
index a3100f718881..8533371eb880 100644
--- a/python/core/auto_generated/geometry/qgsgeometry.sip.in
+++ b/python/core/auto_generated/geometry/qgsgeometry.sip.in
@@ -313,7 +313,7 @@ Returns type of the geometry as a :py:class:`Qgis`.GeometryType
 .. seealso:: :py:func:`wkbType`
 %End
 
-    bool isEmpty() const;
+    bool isEmpty() const /HoldGIL/;
 %Docstring
 Returns ``True`` if the geometry is empty (eg a linestring with no vertices,
 or a collection with no geometries). A null geometry will always
diff --git a/src/core/geometry/qgsgeometry.h b/src/core/geometry/qgsgeometry.h
index 8f5c37369060..8e5186b7a40b 100644
--- a/src/core/geometry/qgsgeometry.h
+++ b/src/core/geometry/qgsgeometry.h
@@ -376,7 +376,7 @@ class CORE_EXPORT QgsGeometry
      * return TRUE for isEmpty().
      * \see isNull()
      */
-    bool isEmpty() const;
+    bool isEmpty() const SIP_HOLDGIL;
 
     //! Returns TRUE if WKB of the geometry is of WKBMulti* type
     bool isMultipart() const SIP_HOLDGIL;