diff --git a/org/qmckl_memory.org b/org/qmckl_memory.org
index caf6acd..64c4a1c 100644
--- a/org/qmckl_memory.org
+++ b/org/qmckl_memory.org
@@ -125,11 +125,10 @@ void* qmckl_malloc(qmckl_context context,
      ~qmckl_context~.
 
   4. The function then allocates memory:
-     If the ~HAVE_HPC~ macro is defined, the memory allocation is done using
-     the ~aligned_alloc~ function with a 64-byte alignment, rounding up the
-     requested size to the nearest multiple of 64 bytes. If the ~HAVE_HPC~
-     macro is not defined, the memory allocation is done using the standard
-     ~malloc~ function.
+     If the ~HAVE_HPC~ and ~HAVE_ALIGNED_ALLOC~ macros are defined, the memory
+     allocation is done using the ~aligned_alloc~ function with a 64-byte alignment,
+     rounding up the requested size to the nearest multiple of 64 bytes. Else, the
+     memory allocation is done using the standard ~malloc~ function.
 
   5  If the allocation fails, the function returns ~NULL~.
 
@@ -154,7 +153,7 @@ void* qmckl_malloc(qmckl_context context, const qmckl_memory_info_struct info) {
   qmckl_context_struct* const ctx = (qmckl_context_struct*) context;
 
   /* Allocate memory and zero it */
-#ifdef HAVE_HPC
+#if defined(HAVE_HPC) && defined(HAVE_ALIGNED_ALLOC)
   assert( ((info.size+64) >> 6) << 6 >= info.size );
   void * pointer = aligned_alloc(64, ((info.size+64) >> 6) << 6 );
 #else
diff --git a/org/qmckl_sherman_morrison_woodbury.org b/org/qmckl_sherman_morrison_woodbury.org
index 6e7d779..c910525 100644
--- a/org/qmckl_sherman_morrison_woodbury.org
+++ b/org/qmckl_sherman_morrison_woodbury.org
@@ -348,22 +348,6 @@ Common includes and macros used by all the Sherman-Morrison-Woodbury kernels.
 #include "assert.h"
 #include "stdio.h"
 
-// Order important because
-// __GNUC__ also set in ICC, ICX and CLANG
-// __clang__ also set in ICX
-#if defined(__INTEL_COMPILER)
-    #define IVDEP _Pragma("ivdep")
-    #define ALIGNED _Pragma("vector aligned") 
-#elif defined(__INTEL_LLVM_COMPILER)
-    #define IVDEP _Pragma("ivdep")
-    #define ALIGNED _Pragma("vector aligned") 
-#elif defined(__clang__)
-    #define IVDEP _Pragma("clang loop vectorize(enable)")
-    #define ALIGNED
-#elif defined(__GNUC__)
-    #define IVDEP _Pragma("GCC ivdep")
-    #define ALIGNED
-#endif
 #+end_src
 
 ~qmckl_sm_naive_hpc~ is a high performance variation of