diff --git a/gtsam/nonlinear/internal/ExecutionTrace.h b/gtsam/nonlinear/internal/ExecutionTrace.h
index 57bfb0795..ccba89dda 100644
--- a/gtsam/nonlinear/internal/ExecutionTrace.h
+++ b/gtsam/nonlinear/internal/ExecutionTrace.h
@@ -17,6 +17,12 @@
  */
 
 #pragma once
+
+// The MSVC compiler insists on knowing extended alignment is ok.
+#ifdef _MSC_VER
+#define _ENABLE_EXTENDED_ALIGNED_STORAGE
+#endif
+
 #include <gtsam/config.h>      // Configuration from CMake
 #include <gtsam/nonlinear/internal/JacobianMap.h>
 #include <gtsam/inference/Key.h>
@@ -33,11 +39,6 @@ namespace internal {
 
 template<int T> struct CallRecord;
 
-// The MSVC compiler insists on knowing extended alignment is ok.
-#ifdef _MSC_VER
-#define _ENABLE_EXTENDED_ALIGNED_STORAGE
-#endif
-
 /// 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.