diff --git a/tcpdf.php b/tcpdf.php
index 25a00d67..23194bd2 100644
--- a/tcpdf.php
+++ b/tcpdf.php
@@ -9927,7 +9927,7 @@ protected function _putcatalog() {
 				}
 				$out .= ' >> >>';
 			}
-			$font = $this->getFontBuffer('helvetica');
+			$font = $this->getFontBuffer((($this->pdfa_mode) ? 'pdfa' : '') .'helvetica');
 			$out .= ' /DA (/F'.$font['i'].' 0 Tf 0 g)';
 			$out .= ' /Q '.(($this->rtl)?'2':'0');
 			//$out .= ' /XFA ';