diff --git a/interface/meson.build b/interface/meson.build
index 647849b48..b98e3ce3f 100644
--- a/interface/meson.build
+++ b/interface/meson.build
@@ -83,7 +83,6 @@ _static_libs += static_library(
     'rot.c',
     include_directories:  _inc,
     c_args: [
-        '-m64',
         '-DSMP_SERVER',
         '-DNO_WARMUP',
         '-DMAX_CPU_NUMBER=12',
diff --git a/kernel/meson.build b/kernel/meson.build
index f14e53969..9ba14a8ad 100644
--- a/kernel/meson.build
+++ b/kernel/meson.build
@@ -786,7 +786,6 @@ _configs = [
    'undef': ['COMPLEX', 'COMPLEX'],
    'def': ['DOUBLE'],
    'addl': [fma3_flag,
-        '-m64',
         '-DSMP_SERVER',
         '-DNO_WARMUP',
         '-DMAX_CPU_NUMBER=12',
diff --git a/meson.build b/meson.build
index 8986a7fc1..5e9a9e702 100644
--- a/meson.build
+++ b/meson.build
@@ -153,6 +153,10 @@ if cpu_fam in ['x86_64', 'ppc64', 'ppc']
   ], language:'c')
 endif
 
+if cpu_fam == 'x86_64'
+  _cargs += ['-m64']
+endif
+
 if fc_id == 'gcc'
     add_project_arguments('-DF_INTERFACE_GFORT', language: 'c')
 elif fc_id == 'g95'