diff --git a/config/ifort_avx.cfg b/config/ifort_avx.cfg
index d3fcd1f0..7a13348c 100644
--- a/config/ifort_avx.cfg
+++ b/config/ifort_avx.cfg
@@ -32,7 +32,7 @@ OPENMP  : 1          ; Append OpenMP flags
 #
 [OPT]
 FC       : -traceback
-FCFLAGS  : -xAVX -O2 -ip -ftz -g 
+FCFLAGS  : -march=corei7-avx -O2 -ip -ftz -g 
 
 # Profiling flags
 #################
diff --git a/config/ifort_avx_mpi.cfg b/config/ifort_avx_mpi.cfg
index a6784058..550dbf91 100644
--- a/config/ifort_avx_mpi.cfg
+++ b/config/ifort_avx_mpi.cfg
@@ -31,14 +31,14 @@ OPENMP  : 1          ; Append OpenMP flags
 # -ftz                       : Flushes denormal results to zero
 #
 [OPT]
-FCFLAGS  : -xAVX -O2 -ip -ftz -g -traceback  
+FCFLAGS  : -march=corei7-avx -O2 -ip -ftz -g -traceback  
 
 # Profiling flags
 #################
 #
 [PROFILE]
 FC       : -p -g
-FCFLAGS  : -xSSE4.2 -O2 -ip -ftz 
+FCFLAGS  : -march=corei7 -O2 -ip -ftz 
 
 
 # Debugging flags