diff --git a/d2chaos/d2chaos.go b/d2chaos/d2chaos.go
index 8b6c74f5e6..c6cf4937c7 100644
--- a/d2chaos/d2chaos.go
+++ b/d2chaos/d2chaos.go
@@ -236,6 +236,9 @@ func (gs *dslGenState) randShape() string {
 		if s != "image" {
 			return s
 		}
+		if s != "sequence_diagram" {
+			return s
+		}
 	}
 }