diff --git a/crypto/SHA-3/COMMEN/align.h b/crypto/SHA-3/COMMEN/align.h
new file mode 100644
index 00000000..9744a007
--- /dev/null
+++ b/crypto/SHA-3/COMMEN/align.h
@@ -0,0 +1,18 @@
+#ifndef _align_h_
+#define _align_h_
+
+#ifdef ALIGN
+#undef ALIGN
+#endif
+
+#if defined(__GNUC__)
+#define ALIGN(x) __attribute__ ((aligned(x)))
+#elif defined(_MSC_VER)
+#define ALIGN(x) __declspec(align(x))
+#elif defined(__ARMCC_VERSION)
+#define ALIGN(x) __align(x)
+#else
+#define ALIGN(x)
+#endif
+
+#endif