diff --git a/packages/slate-schema/src/rules.ts b/packages/slate-schema/src/rules.ts
index f9da503d2..c5aa8e86d 100644
--- a/packages/slate-schema/src/rules.ts
+++ b/packages/slate-schema/src/rules.ts
@@ -13,7 +13,7 @@ export interface MarkRule {
 }
 
 export interface ChildValidation {
-  match?: NodeMatch[]
+  match?: NodeMatch | NodeMatch[]
   min?: number
   max?: number
 }