diff --git a/tests/dlfcn_test.cpp b/tests/dlfcn_test.cpp
index 0bf8775..e3664fd 100644
--- a/tests/dlfcn_test.cpp
+++ b/tests/dlfcn_test.cpp
@@ -258,6 +258,9 @@
   dlclose(handle);
 }
 
+// HWASan uses an ifunc to describe the location of its shadow memory,
+// so even though it's an unusual case, Android needs to support
+// "ifunc variables".
 TEST(dlfcn, ifunc_variable) {
   typedef const char* (*fn_ptr)();