diff --git a/ORCACDefs/stdalign.h b/ORCACDefs/stdalign.h
new file mode 100644
index 0000000..88cebb2
--- /dev/null
+++ b/ORCACDefs/stdalign.h
@@ -0,0 +1,16 @@
+/****************************************************************
+*
+*  stdalign.h - standard alignment macros
+*
+****************************************************************/
+
+#ifndef __stdalign__
+#define __stdalign__
+
+#define alignas _Alignas
+#define alignof _Alignof
+
+#define __alignas_is_defined 1
+#define __alignof_is_defined 1
+
+#endif
diff --git a/ORCACDefs/stddef.h b/ORCACDefs/stddef.h
index 9159207..62cd05f 100644
--- a/ORCACDefs/stddef.h
+++ b/ORCACDefs/stddef.h
@@ -24,6 +24,8 @@ typedef long ptrdiff_t;
 typedef unsigned long size_t;
 #endif
 
+typedef long max_align_t;
+
 typedef unsigned short wchar_t;
 
 #define offsetof(type,member) ((size_t) (&(((type *)0L)->member)))
diff --git a/ORCACDefs/stdlib.h b/ORCACDefs/stdlib.h
index 173a4c4..e7bc5f7 100644
--- a/ORCACDefs/stdlib.h
+++ b/ORCACDefs/stdlib.h
@@ -39,6 +39,7 @@ typedef struct {long quot,rem;} ldiv_t;
 
 int             abs(int);
 void            abort(void);
+void           *aligned_alloc(size_t, size_t);
 int             atexit(void (*__func)(void));
 double          atof(const char *);
 int             atoi(const char *);