diff --git a/README.md b/README.md
index 6dd2b36..406e138 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,9 @@ data.
 
 Cache lines are assumed to be N bytes long, depending on the architecture:
 
-* On x86-64 and aarch64, N = 128.
+* On x86-64, aarch64, and powerpc64, N = 128.
+* On arm, mips, mips64, and riscv64, N = 32.
+* On s390x, N = 256.
 * On all others, N = 64.
 
 Note that N is just a reasonable guess and is not guaranteed to match the actual cache line
diff --git a/src/lib.rs b/src/lib.rs
index 4d602cb..5eb3abc 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -13,6 +13,7 @@
 //! * On x86-64, aarch64, and powerpc64, N = 128.
 //! * On arm, mips, mips64, and riscv64, N = 32.
 //! * On s390x, N = 256.
+//! * On all others, N = 64.
 //!
 //! Note that N is just a reasonable guess and is not guaranteed to match the actual cache line
 //! length of the machine the program is running on.