diff --git a/README.md b/README.md
index 80714d76..e18ca474 100644
--- a/README.md
+++ b/README.md
@@ -37,6 +37,8 @@ MPI, OpenMP, and SIMD parallelism are present in the library.
 by setting variables in the command line or in the environment.  Here
 are examples:
 
+     ./configure CXX=clang++ CXXFLAGS="-std=c++11 -O3 -msse4" --enable-simd=SSE4
+
      ./configure CXX=clang++ CXXFLAGS="-std=c++11 -O3 -mavx" --enable-simd=AVX1
 
      ./configure CXX=clang++ CXXFLAGS="-std=c++11 -O3 -mavx2" --enable-simd=AVX2
diff --git a/lib/simd/Grid_vector_types.h b/lib/simd/Grid_vector_types.h
index 14b2ddf0..360e9f1b 100644
--- a/lib/simd/Grid_vector_types.h
+++ b/lib/simd/Grid_vector_types.h
@@ -37,7 +37,6 @@ namespace Grid {
 
   /*
     @brief Grid_simd class for the SIMD vector type operations
-
    */
   template < class Scalar_type, class Vector_type > 
     class Grid_simd {
@@ -100,14 +99,9 @@ namespace Grid {
     template <  class S = Scalar_type,typename std::enable_if < std::is_integral < S >::value, int >::type = 0 > 
     friend inline void vzero(Grid_simd &ret)      { vsplat(ret,0); }
 
-
-    
     // do not compile if real or integer, send an error message from the compiler
     template < class S = Scalar_type,typename std::enable_if < is_complex < S >::value, int >::type = 0 > 
     friend inline void vcomplex_i(Grid_simd &ret){ vsplat(ret,0.0,1.0);}
-       
-
-    
    
     ////////////////////////////////////
     // Arithmetic operator overloads +,-,*