diff --git a/api-hashes-generator.php b/api-hashes-generator.php
index 51b366e..91ef868 100644
--- a/api-hashes-generator.php
+++ b/api-hashes-generator.php
@@ -19,7 +19,7 @@
 		$checksums = json_decode( $checksums, true );
 		$hashes = "<?php\n" . '$filehashes = array(' . "\n";
 		foreach ( $checksums['checksums'] as $file => $checksum ) {
-			if ( ! strstr( $file, 'wp-content' ) ) {
+			if ( stripos( $file, 'wp-content' ) !== 0 ) {
 				$hashes .= "\t'" . $file . "' => '" . $checksum . "',\n";
 			}
 		}