diff --git a/src/apps/debuganalyzer/model/ThreadModel.cpp b/src/apps/debuganalyzer/model/ThreadModel.cpp
index f8517b2a3e..28eb3af122 100644
--- a/src/apps/debuganalyzer/model/ThreadModel.cpp
+++ b/src/apps/debuganalyzer/model/ThreadModel.cpp
@@ -101,7 +101,7 @@ ThreadModel::FindSchedulingEvent(bigtime_t time)
 	time += fModel->BaseTime();
 
 	int32 lower = 0;
-	int32 upper = CountSchedulingEvents();
+	int32 upper = CountSchedulingEvents() - 1;
 
 	while (lower < upper) {
 		int32 mid = (lower + upper) / 2;