diff --git a/tools/profiler/sps_sampler.h b/tools/profiler/sps_sampler.h
index 71a426ae5c5..140f51506ef 100644
--- a/tools/profiler/sps_sampler.h
+++ b/tools/profiler/sps_sampler.h
@@ -262,6 +262,7 @@ public:
     : mStackPointer(0)
     , mMarkerPointer(0)
     , mQueueClearMarker(false)
+    , mRuntime(NULL)
     , mStartJSSampling(false)
   { }