diff --git a/3rdParty/hash-library/md5.cpp b/3rdParty/hash-library/md5.cpp
index 9c54dd9bd5..2bcb186cfc 100644
--- a/3rdParty/hash-library/md5.cpp
+++ b/3rdParty/hash-library/md5.cpp
@@ -292,7 +292,7 @@ void MD5::processBuffer()
   if (paddedLength < BlockSize)
     addLength = m_buffer + paddedLength;
   else
-    addLength = extra + paddedLength - BlockSize;
+    addLength = extra + (paddedLength - BlockSize);
 
   // must be little endian
   *addLength++ = msgBits & 0xFF; msgBits >>= 8;