diff --git a/gtsam/navigation/ManifoldPreintegration.h b/gtsam/navigation/ManifoldPreintegration.h
index a8c97477b..40691c445 100644
--- a/gtsam/navigation/ManifoldPreintegration.h
+++ b/gtsam/navigation/ManifoldPreintegration.h
@@ -27,7 +27,7 @@
 namespace gtsam {
 
 /**
- * IMU pre-integration on NavSatet manifold.
+ * IMU pre-integration on NavState manifold.
  * This corresponds to the original RSS paper (with one difference: V is rotated)
  */
 class GTSAM_EXPORT ManifoldPreintegration : public PreintegrationBase {