diff --git a/src/wp-includes/pomo/entry.php b/src/wp-includes/pomo/entry.php
index 983f1d4113..cd209e2f20 100644
--- a/src/wp-includes/pomo/entry.php
+++ b/src/wp-includes/pomo/entry.php
@@ -108,7 +108,7 @@ if ( ! class_exists( 'Translation_Entry', false ) ) :
 		public function merge_with( &$other ) {
 			$this->flags      = array_unique( array_merge( $this->flags, $other->flags ) );
 			$this->references = array_unique( array_merge( $this->references, $other->references ) );
-			if ( $this->extracted_comments != $other->extracted_comments ) {
+			if ( $this->extracted_comments !== $other->extracted_comments ) {
 				$this->extracted_comments .= $other->extracted_comments;
 			}