diff --git a/cluster_configs/ifa-cluster.cmake b/cluster_configs/ifa-cluster.cmake
index bcc9b21254cde7dc968ad845b98914dadddae3f4..36ea9bd7dd776757c00f769bf0543e400fd1d41f 100644
--- a/cluster_configs/ifa-cluster.cmake
+++ b/cluster_configs/ifa-cluster.cmake
@@ -35,7 +35,7 @@ if ( COMPILER STREQUAL "gnu")
         set(CMAKE_CXX_COMPILER     mpicxx CACHE STRING "CXX compiler"     FORCE) # C++ compiler for parallel build
         set(CMAKE_Fortran_COMPILER mpifort CACHE STRING "Fortran compiler" FORCE) # Fortran compiler for parallel build
     endif()
-    set(comp_flags -O3 -fno-strict-aliasing -funroll-loops -march=native -std=c++0x CACHE  STRING  "comp_flags to add" FORCE)
+    set(comp_flags -O3 -fno-strict-aliasing -funroll-loops -march=native  -mavx -std=c++0x CACHE  STRING  "comp_flags to add" FORCE)
 endif()
 
 #specify stuff for run-script
@@ -53,4 +53,4 @@ if ( COMPILER  STREQUAL "gnu")
 endif ()
 message("prerun exprots:" ${prerun_env_export})
 message("run executable is:" ${run_exec})
-message("compiler choice:" ${COMPILER})
\ No newline at end of file
+message("compiler choice:" ${COMPILER})