diff --git a/gtsam/nonlinear/internal/ExecutionTrace.h b/gtsam/nonlinear/internal/ExecutionTrace.h
index a147f505e..ace0aaea8 100644
--- a/gtsam/nonlinear/internal/ExecutionTrace.h
+++ b/gtsam/nonlinear/internal/ExecutionTrace.h
@@ -35,7 +35,7 @@ template<int T> struct CallRecord;
 /// Storage type for the execution trace.
 /// It enforces the proper alignment in a portable way.
 /// Provide a traceSize() sized array of this type to traceExecution as traceStorage.
-static const unsigned TraceAlignment = 16;
+static const unsigned TraceAlignment = 32;
 typedef boost::aligned_storage<1, TraceAlignment>::type ExecutionTraceStorage;
 
 template<bool UseBlock, typename Derived>