--- external/pdfium/annot.patch.1
+++ external/pdfium/annot.patch.1
@@ -2,6 +2,17 @@ diff --git a/fpdfsdk/fpdf_annot.cpp b/fpdfsdk/fpdf_annot.cpp
 index bc1f7f7eb..075baf1df 100644
 --- a/fpdfsdk/fpdf_annot.cpp
 +++ b/fpdfsdk/fpdf_annot.cpp
+@@ -8,6 +8,10 @@
+ #include <sstream>
+ #include <utility>
+ #include <vector>
++#ifdef USE_SYSTEM_ABSEIL
++#include <optional>
++#include <absl/types/optional.h>
++#endif
+ 
+ #include "constants/annotation_common.h"
+ #include "core/fpdfapi/edit/cpdf_pagecontentgenerator.h"
 @@ -1366,6 +1366,42 @@ FPDFAnnot_GetFontSize(FPDF_FORMHANDLE hHandle,
    return true;
  }
@@ -32,7 +40,7 @@ index bc1f7f7eb..075baf1df 100644
 +  if (!pWidget)
 +    return false;
 +
-+  std::optional<FX_COLORREF> text_color = pWidget->GetTextColor();
++  absl::optional<FX_COLORREF> text_color = pWidget->GetTextColor();
 +  if (!text_color)
 +    return false;
 +