diff --git a/src/copy/pv/pvArrayPlugin.h b/src/copy/pv/pvArrayPlugin.h
index 3fe8bb0..739a4b9 100644
--- a/src/copy/pv/pvArrayPlugin.h
+++ b/src/copy/pv/pvArrayPlugin.h
@@ -6,8 +6,9 @@
 #ifndef PVARRAYPLUGIN_H
 #define PVARRAYPLUGIN_H
 
-#if defined(_WIN32) && !defined(NOMINMAX)
-#define NOMINMAX
+#ifdef epicsExportSharedSymbols
+#   define pvaConstantsepicsExportSharedSymbols
+#   undef epicsExportSharedSymbols
 #endif
 
 #include <string>
diff --git a/src/copy/pv/pvDeadbandPlugin.h b/src/copy/pv/pvDeadbandPlugin.h
index 0675ef4..b4d917a 100644
--- a/src/copy/pv/pvDeadbandPlugin.h
+++ b/src/copy/pv/pvDeadbandPlugin.h
@@ -6,8 +6,9 @@
 #ifndef PVDEADBANDPLUGIN_H
 #define PVDEADBANDPLUGIN_H
 
-#if defined(_WIN32) && !defined(NOMINMAX)
-#define NOMINMAX
+#ifdef epicsExportSharedSymbols
+#   define pvaConstantsepicsExportSharedSymbols
+#   undef epicsExportSharedSymbols
 #endif
 
 #include <string>
diff --git a/src/copy/pv/pvPlugin.h b/src/copy/pv/pvPlugin.h
index 21cf735..a66814f 100644
--- a/src/copy/pv/pvPlugin.h
+++ b/src/copy/pv/pvPlugin.h
@@ -9,8 +9,9 @@
 #ifndef PVPLUGIN_H
 #define PVPLUGIN_H
 
-#if defined(_WIN32) && !defined(NOMINMAX)
-#define NOMINMAX
+#ifdef epicsExportSharedSymbols
+#   define pvaConstantsepicsExportSharedSymbols
+#   undef epicsExportSharedSymbols
 #endif
 
 #include <string>
diff --git a/src/copy/pv/pvStructureCopy.h b/src/copy/pv/pvStructureCopy.h
index d2e864a..4564640 100644
--- a/src/copy/pv/pvStructureCopy.h
+++ b/src/copy/pv/pvStructureCopy.h
@@ -10,8 +10,9 @@
 #ifndef PVSTRUCTURECOPY_H
 #define PVSTRUCTURECOPY_H
 
-#if defined(_WIN32) && !defined(NOMINMAX)
-#define NOMINMAX
+#ifdef epicsExportSharedSymbols
+#   define pvaConstantsepicsExportSharedSymbols
+#   undef epicsExportSharedSymbols
 #endif
 
 #include <string>
diff --git a/src/copy/pv/pvTimestampPlugin.h b/src/copy/pv/pvTimestampPlugin.h
index 4fa0492..1c9d77a 100644
--- a/src/copy/pv/pvTimestampPlugin.h
+++ b/src/copy/pv/pvTimestampPlugin.h
@@ -6,8 +6,9 @@
 #ifndef PVTIMESTAMPPLUGIN_H
 #define PVTIMESTAMPPLUGIN_H
 
-#if defined(_WIN32) && !defined(NOMINMAX)
-#define NOMINMAX
+#ifdef epicsExportSharedSymbols
+#   define pvaConstantsepicsExportSharedSymbols
+#   undef epicsExportSharedSymbols
 #endif
 
 #include <string>