diff --git a/server/TracyView.cpp b/server/TracyView.cpp
index 5368f1e5..c1b3c681 100644
--- a/server/TracyView.cpp
+++ b/server/TracyView.cpp
@@ -2477,6 +2477,7 @@ int View::DispatchGpuZoneLevel( const Vector<GpuEvent*>& vec, bool hover, double
 
 static int64_t AdjustGpuTime( int64_t time, int64_t begin, int drift )
 {
+    if( time == -1 ) return -1;
     const auto t = time - begin;
     return time + t / 1000000000 * drift;
 }