diff --git a/src/libCom/osi/devLibVMEImpl.h b/src/libCom/osi/devLibVMEImpl.h
index 1f5db3bb4..63d794ca3 100644
--- a/src/libCom/osi/devLibVMEImpl.h
+++ b/src/libCom/osi/devLibVMEImpl.h
@@ -92,6 +92,11 @@ typedef struct devLibVME {
 
 epicsShareExtern devLibVME *pdevLibVME;
 
+#ifndef NO_DEVLIB_COMPAT
+#  define pdevLibVirtualOS pdevLibVME
+#endif
+
+
 #ifdef __cplusplus
 }
 #endif