diff --git a/src/ca/msgForMultiplyDefinedPV.h b/src/ca/msgForMultiplyDefinedPV.h
index b79f7f2b5..545adc815 100644
--- a/src/ca/msgForMultiplyDefinedPV.h
+++ b/src/ca/msgForMultiplyDefinedPV.h
@@ -26,10 +26,19 @@
 #ifndef msgForMultiplyDefinedPVh
 #define msgForMultiplyDefinedPVh
 
+#ifdef epicsExportSharedSymbols
+#   define msgForMultiplyDefinedPVh_epicsExportSharedSymbols
+#   undef epicsExportSharedSymbols
+#endif
+
 #include "ipAddrToAsciiAsynchronous.h"
 #include "tsFreeList.h"
 #include "compilerDependencies.h"
 
+#ifdef msgForMultiplyDefinedPVh_epicsExportSharedSymbols
+#   define epicsExportSharedSymbols
+#endif
+
 class callbackForMultiplyDefinedPV { // X aCC 655
 public:
     virtual ~callbackForMultiplyDefinedPV () = 0;