diff --git a/tests/stack_protector_test.cpp b/tests/stack_protector_test.cpp
index 664a11e..97d5ad6 100644
--- a/tests/stack_protector_test.cpp
+++ b/tests/stack_protector_test.cpp
@@ -36,7 +36,7 @@
 
 #ifdef __i386__
 
-// For x86, bionic and glibc have per-thread stack guard values.
+// For x86, bionic and glibc have per-thread stack guard values (all identical).
 
 static uint32_t GetGuardFromTls() {
   uint32_t guard;