diff --git a/wp-includes/pomo/po.php b/wp-includes/pomo/po.php
index 723ffaec53..f76be01139 100644
--- a/wp-includes/pomo/po.php
+++ b/wp-includes/pomo/po.php
@@ -355,7 +355,7 @@ class PO extends Gettext_Translations {
 			return true;
 		}
 		$line = $use_last_line? $last_line : fgets($f);
-		$line = gp_endswith( $line, "\r\n" )? rtrim( $line, "\r\n" ) . "\n" : $line;
+		$line = ( "\r\n" == substr( $line, -2 ) ) ? rtrim( $line, "\r\n" ) . "\n" : $line;
 		$last_line = $line;
 		$use_last_line = false;
 		return $line;
@@ -381,4 +381,4 @@ class PO extends Gettext_Translations {
 		return $s;
 	}
 }
-endif;
\ No newline at end of file
+endif;