diff --git a/gtsam/geometry/Rot3.cpp b/gtsam/geometry/Rot3.cpp
index c1247da2e..aaf23e685 100644
--- a/gtsam/geometry/Rot3.cpp
+++ b/gtsam/geometry/Rot3.cpp
@@ -33,7 +33,7 @@ namespace gtsam {
 /* ************************************************************************* */
 void Rot3::print(const std::string& s) const {
   cout << (s.empty() ? "R: " : s + " ");
-  gtsam::print((Matrix)matrix());
+  gtsam::print(static_cast<Matrix>(matrix()));
 }
 
 /* ************************************************************************* */