diff --git a/README.md b/README.md
index 266ced4..f987ffe 100644
--- a/README.md
+++ b/README.md
@@ -41,6 +41,8 @@ npx playwright test --project=chromium --trace on
 
 ## Change log
 
+[ 不具合修正 ] 391 行目の条件式がおかしかったのを修正
+
 0.2.1
 [ 不具合修正 ] テーマ名取得方法 修正
 
diff --git a/src/VkCssOptimize.php b/src/VkCssOptimize.php
index 85fdaba..1432e6f 100755
--- a/src/VkCssOptimize.php
+++ b/src/VkCssOptimize.php
@@ -388,7 +388,7 @@ public static function get_css_minify_array() {
 		// 圧縮用の情報を生成.
 		if ( ! empty( $simple_minify_handles ) && is_array( $simple_minify_handles ) ) {
 			foreach ( $simple_minify_handles as $css_handle ) {
-				if ( ! empty( $registerd[ $css_handle ] && false !== strpos( $registerd[ $css_handle ]->src, site_url() ) ) ) {
+				if ( ! empty( $registerd[ $css_handle ] ) && false !== strpos( $registerd[ $css_handle ]->src, site_url() ) ) {
 					$css_array['simple_minify_css'][ $css_handle ] = array(
 						'id'      => $css_handle,
 						'url'     => $registerd[ $css_handle ]->src,