diff --git a/Pdf4QtLibCore/sources/pdfstreamfilters.cpp b/Pdf4QtLibCore/sources/pdfstreamfilters.cpp
index 4becfa4..203b036 100644
--- a/Pdf4QtLibCore/sources/pdfstreamfilters.cpp
+++ b/Pdf4QtLibCore/sources/pdfstreamfilters.cpp
@@ -895,7 +895,7 @@ QByteArray PDFStreamPredictor::applyPNGPredictor(const QByteArray& data) const
             }
 
             // Fill the output buffer
-            outputData.push_back(static_cast<const char>(line[lineIndex]));
+            outputData.push_back(static_cast<char>(line[lineIndex]));
         }
 
         // Swap the buffers
diff --git a/Pdf4QtLibCore/sources/pdfutils.cpp b/Pdf4QtLibCore/sources/pdfutils.cpp
index 0e343b6..3e3defc 100644
--- a/Pdf4QtLibCore/sources/pdfutils.cpp
+++ b/Pdf4QtLibCore/sources/pdfutils.cpp
@@ -225,7 +225,7 @@ void PDFBitWriter::flush(bool alignToByteBoundary)
         for (Value byteIndex = 0; byteIndex < bytesToWrite; ++byteIndex)
         {
             const Value shift = (bytesToWrite - 1 - byteIndex) * 8;
-            m_outputByteArray.push_back(static_cast<const char>(static_cast<uint8_t>((alignedBuffer >> shift) & 0xFF)));
+            m_outputByteArray.push_back(static_cast<char>(static_cast<uint8_t>((alignedBuffer >> shift) & 0xFF)));
         }
 
         m_bitsInBuffer = remainder;