diff --git a/src/libCom/osi/os/VMS/osiWireFormat.h b/src/libCom/osi/os/VMS/osiWireFormat.h
new file mode 100644
index 000000000..e8d1b8130
--- /dev/null
+++ b/src/libCom/osi/os/VMS/osiWireFormat.h
@@ -0,0 +1,22 @@
+
+
+#ifndef osiWireFormat
+#define osiWireFormat
+
+#include "epicsTypes.h"
+
+inline void osiConvertToWireFormat ( const epicsFloat32 &value, unsigned char *pWire )
+{
+    cvt$convert_float ( &value, CVT$K_VAX_F , pWire, CVT$K_IEEE_S, CVT$M_BIG_ENDIAN );
+}
+
+inline void osiConvertToWireFormat ( const epicsFloat64 &value, unsigned char *pWire )
+{
+#   if defined ( __G_FLOAT ) && ( __G_FLOAT == 1 )
+        cvt$convert_float ( &value, CVT$K_VAX_G , pWire, CVT$K_IEEE_T, CVT$M_BIG_ENDIAN );
+#   else
+        cvt$convert_float ( &value, CVT$K_VAX_D , pWire, CVT$K_IEEE_T, CVT$M_BIG_ENDIAN );
+#   endif
+}
+
+#endif // osiWireFormat
\ No newline at end of file