diff --git a/lib/spack/spack/platforms/cray.py b/lib/spack/spack/platforms/cray.py
index 8c5fe525e63..2fccf2fe55e 100644
--- a/lib/spack/spack/platforms/cray.py
+++ b/lib/spack/spack/platforms/cray.py
@@ -21,7 +21,8 @@
     'x86-cascadelake': 'cascadelake',
     'x86-naples': 'zen',
     'x86-rome': 'zen',  # Cheating because we have the wrong modules on rzcrayz
-    'x86-skylake': 'skylake-avx512'
+    'x86-skylake': 'skylake_avx512',
+    'mic-knl': 'mic_knl'
 }