diff --git a/src/wp-includes/functions.php b/src/wp-includes/functions.php
index 12f813fa9d..f5b58315af 100644
--- a/src/wp-includes/functions.php
+++ b/src/wp-includes/functions.php
@@ -2101,11 +2101,11 @@ function path_is_absolute( $path ) {
 	 * This is definitive if true but fails if $path does not exist or contains
 	 * a symbolic link.
 	 */
-	if ( realpath( $path ) == $path ) {
+	if ( realpath( $path ) === $path ) {
 		return true;
 	}
 
-	if ( strlen( $path ) == 0 || '.' === $path[0] ) {
+	if ( strlen( $path ) === 0 || '.' === $path[0] ) {
 		return false;
 	}