diff --git a/MathInputCheckTexvc.php b/MathInputCheckTexvc.php
index 419df64..804e52b 100644
--- a/MathInputCheckTexvc.php
+++ b/MathInputCheckTexvc.php
@@ -80,7 +80,7 @@ class MathInputCheckTexvc extends MathInputCheck {
 
 		if ( strlen( $contents ) === 0 ) {
 			wfDebugLog( 'Math', "TeX check output was empty. \n" );
-			$this->lastError = MathRenderer::getError( 'math_unknown_error' );
+			$this->lastError = $this->convertTexvcError( $contents );
 
 			return false;
 		}