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-rw-r--r--include/qpdf/InputSource.hh3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/qpdf/InputSource.hh b/include/qpdf/InputSource.hh
index b53ac0b3..8d46895d 100644
--- a/include/qpdf/InputSource.hh
+++ b/include/qpdf/InputSource.hh
@@ -30,6 +30,9 @@
#include <stdio.h>
#include <string>
+// Remember to use QPDF_DLL_CLASS on anything derived from InputSource
+// so it will work with dynamic_cast across the shared object
+// boundary.
class QPDF_DLL_CLASS InputSource
{
public: