diff -rupN netgen-6.2.1810/libsrc/general/ngsimd.hpp netgen-6.2.1810-new/libsrc/general/ngsimd.hpp
--- netgen-6.2.1810/libsrc/general/ngsimd.hpp	2018-11-23 10:52:27.000000000 +0100
+++ netgen-6.2.1810-new/libsrc/general/ngsimd.hpp	2019-07-01 15:46:38.858869037 +0200
@@ -6,7 +6,9 @@
 /* Date:   25. Mar. 16                                                    */
 /**************************************************************************/
 
-#include <immintrin.h>
+#if defined(__i386__) || defined(__x86_64__)
+# include <immintrin.h>
+#endif
 #include <tuple>
 #include <ostream>
 #include <stdexcept>