diff --git a/include/openssl/base.h b/include/openssl/base.h
index 8db72d8..bd41d11 100644
--- a/include/openssl/base.h
+++ b/include/openssl/base.h
@@ -104,6 +104,10 @@
 #elif defined(__pnacl__)
 #define OPENSSL_32_BIT
 #define OPENSSL_PNACL
+#elif defined(__wasm__)
+#define OPENSSL_32_BIT
+#elif defined(__asmjs__)
+#define OPENSSL_32_BIT
 #elif defined(__myriad2__)
 #define OPENSSL_32_BIT
 #else