diff --git a/src/libCom/osi/os/vxWorks/osdWireConfig.h b/src/libCom/osi/os/vxWorks/osdWireConfig.h
new file mode 100644
index 000000000..abb62f912
--- /dev/null
+++ b/src/libCom/osi/os/vxWorks/osdWireConfig.h
@@ -0,0 +1,25 @@
+//
+// vxWorks version of
+// osdWireConfig.h
+//
+//	Author Jeffrey O. Hill
+//	johill@lanl.gov
+//
+
+#ifndef osdWireConfig_h
+#define osdWireConfig_h
+
+#include <types/vxArch.h>
+
+#if _BYTE_ORDER == _LITTLE_ENDIAN
+#	define EPICS_BYTE_ORDER EPICS_ENDIAN_LITTLE
+#elif _BYTE_ORDER == _BIG_ENDIAN
+#	define EPICS_BYTE_ORDER EPICS_ENDIAN_BIG
+#else
+#   error EPICS hasn’t been ported to _BYTE_ORDER specified by vxWorks <types/vxArch.h>
+#endif
+
+// for now, assume that vxWorks doesnt run on weird arch like ARM NWFP
+#define EPICS_FLOAT_WORD_ORDER EPICS_BYTE_ORDER
+
+#endif // ifdef osdWireConfig_h