diff --git a/engines/director/channel.cpp b/engines/director/channel.cpp
index 4663233f359..0cf6231ebe2 100644
--- a/engines/director/channel.cpp
+++ b/engines/director/channel.cpp
@@ -162,7 +162,12 @@ const Graphics::Surface *Channel::getMask(bool forceMatte) {
 		// as they already have all non-enclosed white pixels transparent.
 		// Matte on text has a trivial enough effect to not worry about implementing.
 		if (_sprite->_cast->_type == kCastBitmap) {
-			return ((BitmapCastMember *)_sprite->_cast)->getMatte(bbox);
+			BitmapCastMember *bitmap = ((BitmapCastMember *)_sprite->_cast);
+			// 1-bit images only require a matte for the matte ink type
+			if (bitmap->_bitsPerPixel == 1 && _sprite->_ink != kInkTypeMatte) {
+				return nullptr;
+			}
+			return bitmap->getMatte(bbox);
 		} else {
 			return nullptr;
 		}