diff --git a/Sortable.js b/Sortable.js
index 24c95d7b0218cba4f34b1c816462e309504d1033..882f780d607dd6470b18d18ca8bcf9d0c7920d74 100644
--- a/Sortable.js
+++ b/Sortable.js
@@ -134,7 +134,7 @@
 			}
 			return (child1 &&
 				(
-					firstChildCSS.display === 'block' ||
+					child1.style.display === 'block' || // getComputedStyle() gives 'block' when 'inline-block'
 					firstChildCSS.display === 'flex' ||
 					firstChildCSS.display === 'table' ||
 					firstChildCSS.display === 'grid' ||