diff --git a/src/utils/pv/hexDump.h b/src/utils/pv/hexDump.h
index d1f4d7c..06d384f 100644
--- a/src/utils/pv/hexDump.h
+++ b/src/utils/pv/hexDump.h
@@ -47,6 +47,7 @@ public:
     //! start a new line after this many bytes
     inline HexDump& bytesPerLine(size_t n=(size_t)-1) { _perLine = n; return *this; }
 
+    epicsShareFunc
     friend std::ostream& operator<<(std::ostream& strm, const HexDump& hex);
 };