Index: nsdejavu/npsdk/prcpucfg.h
--- nsdejavu/npsdk/prcpucfg.h.orig
+++ nsdejavu/npsdk/prcpucfg.h
@@ -514,7 +514,7 @@
 #define PR_BYTES_PER_WORD_LOG2   2
 #define PR_BYTES_PER_DWORD_LOG2  3
 
-#elif defined(__aarch64__)
+#elif defined(__aarch64__) || (defined(__riscv) && (__riscv_xlen == 64))
 
 #define IS_LITTLE_ENDIAN 1
 #undef  IS_BIG_ENDIAN
