diff --git a/ctest.c b/ctest.c
index df628b1d4..2ccae8dcc 100644
--- a/ctest.c
+++ b/ctest.c
@@ -173,3 +173,8 @@ HAVE_C11
 ARCH_E2K
 #endif
 
+#if defined(__EMSCRIPTEN__)
+ARCH_RISCV64
+OS_WINDOWS
+#endif
+