diff --git a/gtsam_unstable/CMakeLists.txt b/gtsam_unstable/CMakeLists.txt
index 679551dbe..70333099e 100644
--- a/gtsam_unstable/CMakeLists.txt
+++ b/gtsam_unstable/CMakeLists.txt
@@ -32,6 +32,7 @@ set(gtsam_unstable_srcs
     ${discrete_srcs}
     ${dynamics_srcs}
     ${linear_srcs}    
+    ${nonlinear_srcs}
     ${slam_srcs} 
 )