diff --git a/src/PhpWord/Writer/RTF/Part/Header.php b/src/PhpWord/Writer/RTF/Part/Header.php
index 97644fe4ac..d1f44fd67f 100644
--- a/src/PhpWord/Writer/RTF/Part/Header.php
+++ b/src/PhpWord/Writer/RTF/Part/Header.php
@@ -204,6 +204,14 @@ private function registerFont(): void
                 if (method_exists($element, 'getFontStyle')) {
                     $style = $element->getFontStyle();
                     $this->registerFontItems($style);
+                } elseif (method_exists($element, 'getElements')) {
+                    $textRuns = $element->getElements();
+                    foreach ($textRuns as $textRun) {
+                        if (method_exists($textRun, 'getFontStyle')) {
+                            $style = $textRun->getFontStyle();
+                            $this->registerFontItems($style);
+                        }
+                    }
                 }
             }
         }