diff --git a/packages/react-dom/src/shared/CSSProperty.js b/packages/react-dom/src/shared/CSSProperty.js
index fa698b07dbf0..d9d92c7d0314 100644
--- a/packages/react-dom/src/shared/CSSProperty.js
+++ b/packages/react-dom/src/shared/CSSProperty.js
@@ -24,6 +24,7 @@ export const isUnitlessNumber = {
   flexShrink: true,
   flexNegative: true,
   flexOrder: true,
+  gridArea: true,
   gridRow: true,
   gridRowEnd: true,
   gridRowSpan: true,