diff --git a/src/archutils/Unix/Backtrace.h b/src/archutils/Unix/Backtrace.h
index 0d9261b739..fa2b74b0a7 100644
--- a/src/archutils/Unix/Backtrace.h
+++ b/src/archutils/Unix/Backtrace.h
@@ -42,8 +42,10 @@ bool GetThreadBacktraceContext( uint64_t ThreadID, BacktraceContext *ctx );
 
 /* Set up a BacktraceContext to get a backtrace after receiving a signal, given
  * a ucontext_t (see sigaction(2)).  (This interface is UNIX-specific.) */
+#if defined(UNIX)
 #include <ucontext.h>
 void GetSignalBacktraceContext( BacktraceContext *ctx, const ucontext_t *uc );
+#endif
 
 #define BACKTRACE_METHOD_NOT_AVAILABLE ((void*) -1)