diff --git a/test/builtins/CMakeLists.txt b/test/builtins/CMakeLists.txt
index 1579e22..ceacbd8 100644
--- a/test/builtins/CMakeLists.txt
+++ b/test/builtins/CMakeLists.txt
@@ -51,7 +51,7 @@
       string(REPLACE ";" " " BUILTINS_TEST_TARGET_CFLAGS "${BUILTINS_TEST_TARGET_CFLAGS}")
     endif()
   else()
-    if (${arch} MATCHES "arm|aarch64|arm64|i?86|x86_64|AMD64" AND COMPILER_RT_HAS_FLOAT16)
+    if (${arch} MATCHES "arm|aarch64|arm64|i?86|x86_64|AMD64|riscv32|riscv64" AND COMPILER_RT_HAS_FLOAT16)
       list(APPEND BUILTINS_TEST_TARGET_CFLAGS -DCOMPILER_RT_HAS_FLOAT16)
       string(REPLACE ";" " " BUILTINS_TEST_TARGET_CFLAGS "${BUILTINS_TEST_TARGET_CFLAGS}")
     endif()