diff --git a/test/unit/stacktrace.cpp b/test/unit/stacktrace.cpp
index 5b6a4923..b96d48a2 100644
--- a/test/unit/stacktrace.cpp
+++ b/test/unit/stacktrace.cpp
@@ -11,7 +11,7 @@ using namespace std::literals;
 #ifdef _MSC_VER
  #define CPPTRACE_FORCE_INLINE [[msvc::flatten]]
 #else
- #define CPPTRACE_FORCE_INLINE [[gnu::always_inline]]
+ #define CPPTRACE_FORCE_INLINE [[gnu::always_inline]] static
 #endif