diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index d31e58ae42..4a4a944e84 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -2981,9 +2981,15 @@ function _doing_it_wrong( $function, $message, $version ) {
// Allow plugin to filter the output error trigger
if ( WP_DEBUG && apply_filters( 'doing_it_wrong_trigger_error', true ) ) {
- $version = is_null( $version ) ? '' : sprintf( __( '(This message was added in version %s.)' ), $version );
- $message .= ' ' . __( 'Please see Debugging in WordPress for more information.' );
- trigger_error( sprintf( __( '%1$s was called incorrectly. %2$s %3$s' ), $function, $message, $version ) );
+ if ( function_exists( '__' ) ) {
+ $version = is_null( $version ) ? '' : sprintf( __( '(This message was added in version %s.)' ), $version );
+ $message .= ' ' . __( 'Please see Debugging in WordPress for more information.' );
+ trigger_error( sprintf( __( '%1$s was called incorrectly. %2$s %3$s' ), $function, $message, $version ) );
+ } else {
+ $version = is_null( $version ) ? '' : sprintf( '(This message was added in version %s.)', $version );
+ $message .= ' Please see Debugging in WordPress for more information.';
+ trigger_error( sprintf( '%1$s was called incorrectly. %2$s %3$s', $function, $message, $version ) );
+ }
}
}