diff --git a/libsrc/interface/nginterface_v2.cpp b/libsrc/interface/nginterface_v2.cpp
index da4c33f8..b241064d 100644
--- a/libsrc/interface/nginterface_v2.cpp
+++ b/libsrc/interface/nginterface_v2.cpp
@@ -600,7 +600,7 @@ namespace netgen
 
 
 
-#ifdef __AVX2__
+#ifdef __AVX__
 #include <immintrin.h>
   
   template<> DLL_HEADER void Ngx_Mesh ::