diff --git a/cmake/config.guess b/cmake/config.guess
index ccb30f4e7..6506ef56b 100644
--- a/cmake/config.guess
+++ b/cmake/config.guess
@@ -928,6 +928,9 @@ EOF
     m68*:Linux:*:*)
 	echo ${UNAME_MACHINE}-unknown-linux-gnu
 	exit ;;
+    riscv64*:Linux:*:*)
+	echo ${UNAME_MACHINE}-unknown-linux-gnu
+	exit ;;
     mips:Linux:*:* | mips64:Linux:*:*)
 	eval $set_cc_for_build
 	sed 's/^	//' << EOF >$dummy.c