1 files changed, 2 insertions, 2 deletions
diff --git a/core/fpdfdoc/cpdf_structtree.cpp b/core/fpdfdoc/cpdf_structtree.cpp
index 62500ac155..9168a4f01a 100644
--- a/core/fpdfdoc/cpdf_structtree.cpp
+++ b/core/fpdfdoc/cpdf_structtree.cpp
@@ -19,8 +19,8 @@ namespace {
 const int nMaxRecursion = 32;
 
 bool IsTagged(const CPDF_Document* pDoc) {
-  CPDF_Dictionary* pCatalog = pDoc->GetRoot();
-  CPDF_Dictionary* pMarkInfo = pCatalog->GetDictFor("MarkInfo");
+  const CPDF_Dictionary* pCatalog = pDoc->GetRoot();
+  const CPDF_Dictionary* pMarkInfo = pCatalog->GetDictFor("MarkInfo");
   return pMarkInfo && pMarkInfo->GetIntegerFor("Marked");
 }