---
 CMake/unix_config.cmake | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/CMake/unix_config.cmake b/CMake/unix_config.cmake
index 4ec81bb..ecb2c8c 100644
--- a/CMake/unix_config.cmake
+++ b/CMake/unix_config.cmake
@@ -16,6 +16,9 @@ macro(os_set_flags)
     elseif(${MACHINE} MATCHES "powerpc64(le)?-linux-gnu")
         set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   -ftree-vectorize")
         set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -ftree-vectorize")
+    elseif(${MACHINE} MATCHES "riscv-*")
+        set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   -march=rv64ifd")
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=rv64ifd")
     else()
         set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   -mssse3")
         set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mssse3")
-- 
2.43.0