diff --git a/common.h b/common.h
index e6002d322..4eeeb8d55 100644
--- a/common.h
+++ b/common.h
@@ -387,6 +387,10 @@ typedef int blasint;
 #endif
 */
 
+#ifdef __EMSCRIPTEN__
+#define YIELDING
+#endif
+
 #ifndef YIELDING
 #define YIELDING	sched_yield()
 #endif
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
+