diff --git a/test/backtrace_test.pass.cpp b/test/backtrace_test.pass.cpp
index 80346c0..b9388ff 100644
--- a/test/backtrace_test.pass.cpp
+++ b/test/backtrace_test.pass.cpp
@@ -14,7 +14,7 @@
 #include <unwind.h>
 
 extern "C" _Unwind_Reason_Code
-trace_function(struct _Unwind_Context* context, void* ntraced) {
+trace_function(struct _Unwind_Context*, void* ntraced) {
   (*reinterpret_cast<size_t*>(ntraced))++;
   // We should never have a call stack this deep...
   assert(*reinterpret_cast<size_t*>(ntraced) < 20);