diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9983fabcc..b0457cb1c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -293,7 +293,7 @@ endif()
 ### See:  http://eigen.tuxfamily.org/bz/show_bug.cgi?id=704 (Householder QR MKL selection)
 ###       http://eigen.tuxfamily.org/bz/show_bug.cgi?id=705 (Fix MKL LLT return code)
 option(GTSAM_USE_SYSTEM_EIGEN "Find and use system-installed Eigen. If 'off', use the one bundled with GTSAM" OFF)
-option(GTSAM_WITH_EIGEN_UNSUPPORTED "Install Eigen's unsupported modules" ON)
+option(GTSAM_WITH_EIGEN_UNSUPPORTED "Install Eigen's unsupported modules" OFF)
 
 # Switch for using system Eigen or GTSAM-bundled Eigen
 if(GTSAM_USE_SYSTEM_EIGEN)