diff --git a/libsrc/general/mysimd.hpp b/libsrc/general/mysimd.hpp
index 3cf94c5a..801f625c 100644
--- a/libsrc/general/mysimd.hpp
+++ b/libsrc/general/mysimd.hpp
@@ -168,6 +168,10 @@ namespace netgen
 
 #else
 
+  // it's only a dummy without AVX
+  template <typename T>
+  class AlignedAlloc { ; };
+  
   template<>
   class SIMD<double>
   {