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-rw-r--r--core/src/fpdfapi/fpdf_render/fpdf_render.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/core/src/fpdfapi/fpdf_render/fpdf_render.cpp b/core/src/fpdfapi/fpdf_render/fpdf_render.cpp
index 147de51f4d..8e205df281 100644
--- a/core/src/fpdfapi/fpdf_render/fpdf_render.cpp
+++ b/core/src/fpdfapi/fpdf_render/fpdf_render.cpp
@@ -1332,7 +1332,7 @@ FX_BOOL IPDF_OCContext::CheckObjectVisible(const CPDF_PageObject* pObj) {
const CPDF_ContentMarkData* pData = pObj->m_ContentMark;
int nItems = pData->CountItems();
for (int i = 0; i < nItems; i++) {
- CPDF_ContentMarkItem& item = pData->GetItem(i);
+ const CPDF_ContentMarkItem& item = pData->GetItem(i);
if (item.GetName() == "OC" &&
item.GetParamType() == CPDF_ContentMarkItem::PropertiesDict &&
!CheckOCGVisible(item.GetParam())) {