diff --git a/wp-includes/plugin.php b/wp-includes/plugin.php
index 27a65ee1b5..06d727f313 100644
--- a/wp-includes/plugin.php
+++ b/wp-includes/plugin.php
@@ -325,10 +325,10 @@ function remove_all_filters( $tag, $priority = false ) {
 	global $wp_filter, $merged_filters;
 
 	if ( isset( $wp_filter[ $tag ]) ) {
-		if ( false !== $priority && isset( $wp_filter[ $tag ][ $priority ] ) ) {
-			$wp_filter[ $tag ][ $priority ] = array();
-		} else {
+		if ( false === $priority ) {
 			$wp_filter[ $tag ] = array();
+		} else if ( isset( $wp_filter[ $tag ][ $priority ] ) ) {
+			$wp_filter[ $tag ][ $priority ] = array();
 		}
 	}
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 9a29121424..28d64377df 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.2-alpha-31013';
+$wp_version = '4.2-alpha-31014';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.