diff --git a/mpcdf_common.py b/mpcdf_common.py
index 91aaabd5c1771bc2e285a8ff5358b25885407a6b..fc5bfa4a1dc538855f033cece914945810495c7c 100644
--- a/mpcdf_common.py
+++ b/mpcdf_common.py
@@ -16,8 +16,8 @@ else:
     from osc.util.helper import decode_it
 
 
-known_microarchs = {"haswell", "skylake", "znver2", "znver4"}
-default_microarch = "haswell"
+known_microarchs = {"skylake", "znver2", "znver4"}
+default_microarch = "skylake"
 
 package_attributes = ["MPCDF:enable_repositories"]
 config_attributes = ["MPCDF:compiler_modules", "MPCDF:cuda_modules", "MPCDF:rocm_modules", "MPCDF:mpi_modules", "MPCDF:pgi_modules", "MPCDF:openmpi_flavors"]