diff --git a/cpu/BUILD b/cpu/BUILD
index e06de69..303ce3f 100644
--- a/cpu/BUILD
+++ b/cpu/BUILD
@@ -26,6 +26,11 @@
 )
 
 constraint_value(
+    name = "armv6-m", # Commonly known as thumbv6
+    constraint_setting = ":cpu",
+)
+
+constraint_value(
     name = "arm64_32",
     constraint_setting = ":cpu",
 )