diff --git a/CMakeLists.txt b/CMakeLists.txt
index ed6b31db9..c7b7cf9b6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -61,7 +61,7 @@ endif()
 option(GTSAM_INSTALL_MATLAB_TOOLBOX      "Enable/Disable installation of matlab toolbox"  ON)
 option(GTSAM_BUILD_WRAP                  "Enable/Disable building of matlab wrap utility (necessary for matlab interface)" ON)
 option(GTSAM_INSTALL_WRAP                "Enable/Disable installation of wrap utility for wrapping other libraries"    ON)
-set(GTSAM_TOOLBOX_INSTALL_PATH "" CACHE DOCSTRING "Matlab toolbox destination, blank defaults to CMAKE_INSTALL_PREFIX/borg/toolbox")
+set(GTSAM_TOOLBOX_INSTALL_PATH "" CACHE PATH "Matlab toolbox destination, blank defaults to CMAKE_INSTALL_PREFIX/borg/toolbox")
 set(GTSAM_BUILD_MEX_BINARY_FLAGS "" CACHE STRING "Extra flags for running Matlab MEX compilation")
 set(MEX_COMMAND "mex" CACHE FILEPATH "Command to use for executing mex (if on path, 'mex' will work)")