diff --git a/pool.go b/pool.go
index b85a977..c73a69d 100644
--- a/pool.go
+++ b/pool.go
@@ -178,7 +178,7 @@ func (pool *Pool) closeRuntime(ctx context.Context, rtrackerIdx int, rtracker *R
 	// We then remove the runtime from the slice
 	newSlice := make([]*RuntimeTracker, len(pool.runtimes)-1)
 	copy(newSlice, pool.runtimes[:rtrackerIdx])
-	copy(newSlice, pool.runtimes[rtrackerIdx+1:])
+	copy(newSlice[rtrackerIdx:], pool.runtimes[rtrackerIdx+1:])
 	pool.runtimes = newSlice
 }