diff --git a/packages/block-library/src/search/edit.js b/packages/block-library/src/search/edit.js
index df00d0c10c0678..04f0ca3cbc5c00 100644
--- a/packages/block-library/src/search/edit.js
+++ b/packages/block-library/src/search/edit.js
@@ -457,7 +457,7 @@ export default function SearchEdit( {
 							onUnitChange={ ( newUnit ) => {
 								setAttributes( {
 									width:
-										newUnit === '%'
+										'%' === newUnit
 											? PC_WIDTH_DEFAULT
 											: PX_WIDTH_DEFAULT,
 									widthUnit: newUnit,