diff --git a/client/TracySysTrace.cpp b/client/TracySysTrace.cpp
index 8725798e..8c39a350 100644
--- a/client/TracySysTrace.cpp
+++ b/client/TracySysTrace.cpp
@@ -85,6 +85,10 @@ struct StackWalkEvent
     uint64_t stack[192];
 };
 
+#ifdef __CYGWIN__
+extern "C" ULONG WMIAPI TraceSetInformation(TRACEHANDLE SessionHandle, TRACE_INFO_CLASS InformationClass, PVOID TraceInformation, ULONG InformationLength);
+#endif
+
 void WINAPI EventRecordCallback( PEVENT_RECORD record )
 {
 #ifdef TRACY_ON_DEMAND