diff --git a/ABI.h.in b/ABI.h.in
index b71cdfb9f..21c9139c0 100644
--- a/ABI.h.in
+++ b/ABI.h.in
@@ -398,6 +398,10 @@ suppression macro @KWIML@_ABI_NO_VERIFY was defined.
 #elif defined(__mips) || defined(__mips__) || defined(__MIPS__)
 # define @KWIML@_ABI_ENDIAN_ID @KWIML@_ABI_ENDIAN_ID_BIG
 
+/* OpenRISC 1000 */
+#elif defined(__or1k__)
+# define @KWIML@_ABI_ENDIAN_ID @KWIML@_ABI_ENDIAN_ID_BIG
+
 /* RS/6000 */
 #elif defined(__THW_RS600) || defined(_IBMR2) || defined(_POWER)
 # define @KWIML@_ABI_ENDIAN_ID @KWIML@_ABI_ENDIAN_ID_BIG