diff --git a/blocks/library/quote/index.js b/blocks/library/quote/index.js
index 68380fd59a2b80..7432ece6968dce 100644
--- a/blocks/library/quote/index.js
+++ b/blocks/library/quote/index.js
@@ -30,6 +30,10 @@ registerBlockType( 'core/quote', {
 		citation: children( 'footer' ),
 	},
 
+	defaultAttributes: {
+		value: [],
+	},
+
 	transforms: {
 		from: [
 			{