diff --git a/app/design/frontend/Magento/luma/Magento_CatalogSearch/web/css/source/_module.less b/app/design/frontend/Magento/luma/Magento_CatalogSearch/web/css/source/_module.less
index f785dd74d900e..0f91f857a715c 100644
--- a/app/design/frontend/Magento/luma/Magento_CatalogSearch/web/css/source/_module.less
+++ b/app/design/frontend/Magento/luma/Magento_CatalogSearch/web/css/source/_module.less
@@ -18,6 +18,20 @@
 //  _____________________________________________
 
 & when (@media-common = true) {
+    
+    .search {
+        .fieldset {
+            .control {
+                .addon {
+                    input {
+                        flex-basis: auto;
+                        width: 100%;
+                    }
+                }
+            }
+        }
+    }
+    
     .block-search {
         margin-bottom: 0;