diff --git a/libgimp/gimp.def b/libgimp/gimp.def
index df9a921269..72bb2495ea 100644
--- a/libgimp/gimp.def
+++ b/libgimp/gimp.def
@@ -77,6 +77,7 @@ EXPORTS
 	gimp_context_get_brush_hardness
 	gimp_context_get_brush_size
 	gimp_context_get_brush_spacing
+	gimp_context_set_diagonal_neighbors
 	gimp_context_get_dynamics
 	gimp_context_get_feather
 	gimp_context_get_feather_radius
@@ -132,6 +133,7 @@ EXPORTS
 	gimp_context_set_brush_spacing
 	gimp_context_set_default_colors
 	gimp_context_set_defaults
+	gimp_context_set_diagonal_neighbors
 	gimp_context_set_dynamics
 	gimp_context_set_feather
 	gimp_context_set_feather_radius