diff --git a/gtsam/geometry/Rot3.h b/gtsam/geometry/Rot3.h
index bfa42c980..99f9c9387 100644
--- a/gtsam/geometry/Rot3.h
+++ b/gtsam/geometry/Rot3.h
@@ -22,10 +22,7 @@
 #pragma once
 
 #include <gtsam/config.h> // Get GTSAM_USE_QUATERNIONS macro
-
-#ifdef GTSAM_USE_QUATERNIONS
 #include <gtsam/geometry/Quaternion.h>
-#endif
 
 // You can override the default coordinate mode using this flag
 #ifndef ROT3_DEFAULT_COORDINATES_MODE