diff --git a/src/copy/pvPlugin.cpp b/src/copy/pvPlugin.cpp
index 7910739..44ae504 100644
--- a/src/copy/pvPlugin.cpp
+++ b/src/copy/pvPlugin.cpp
@@ -4,6 +4,7 @@
  */
 
 #include <pv/pvData.h>
+#include <pv/pvStructureCopy.h>
 #define epicsExportSharedSymbols
 #include <pv/pvPlugin.h>