diff --git a/Pdf4QtLibCore/sources/pdfflatarray.h b/Pdf4QtLibCore/sources/pdfflatarray.h
index 2a9634fd..8f1a0c44 100644
--- a/Pdf4QtLibCore/sources/pdfflatarray.h
+++ b/Pdf4QtLibCore/sources/pdfflatarray.h
@@ -71,11 +71,11 @@ class PDFFlatArray
     {
         if constexpr (index < FlatSize)
         {
-            return m_flatBlock[size];
+            return m_flatBlock[size()];
         }
         else
         {
-            return m_variableBlock[size - FlatSize];
+            return m_variableBlock[size() - FlatSize];
         }
     }
 
@@ -84,11 +84,11 @@ class PDFFlatArray
     {
         if constexpr (index < FlatSize)
         {
-            return m_flatBlock[size];
+            return m_flatBlock[size()];
         }
         else
         {
-            return m_variableBlock[size - FlatSize];
+            return m_variableBlock[size() - FlatSize];
         }
     }