diff --git a/gtsam/geometry/tests/testRot3Q.cpp b/gtsam/geometry/tests/testRot3Q.cpp
index 990be345f..5db99e4e3 100644
--- a/gtsam/geometry/tests/testRot3Q.cpp
+++ b/gtsam/geometry/tests/testRot3Q.cpp
@@ -440,13 +440,13 @@ TEST( Rot3, expmapStability ) {
 TEST(Rot3, quaternion) {
   // NOTE: This is also verifying the ability to convert Vector to Quaternion
   Quaternion q1(0.710997408193224, 0.360544029310185, 0.594459869568306, 0.105395217842782);
-  Rot3 R1 = Rot3((Matrix(3, 3) <<
+  Rot3 R1 = Rot3((Matrix)(Matrix(3, 3) <<
       0.271018623057411,   0.278786459830371,   0.921318086098018,
       0.578529366719085,   0.717799701969298,  -0.387385285854279,
      -0.769319620053772,   0.637998195662053,   0.033250932803219));
 
   Quaternion q2(0.263360579192421, 0.571813128030932, 0.494678363680335, 0.599136268678053);
-  Rot3 R2 = Rot3((Matrix(3, 3) <<
+  Rot3 R2 = Rot3((Matrix)(Matrix(3, 3) <<
       -0.207341903877828,   0.250149415542075,   0.945745528564780,
        0.881304914479026,  -0.371869043667957,   0.291573424846290,
        0.424630407073532,   0.893945571198514,  -0.143353873763946));