diff --git a/gtsam/CMakeLists.txt b/gtsam/CMakeLists.txt
index 97f7a2c41..82cdf2bad 100644
--- a/gtsam/CMakeLists.txt
+++ b/gtsam/CMakeLists.txt
@@ -136,13 +136,13 @@ endif()
 target_include_directories(gtsam BEFORE PUBLIC
   # SuiteSparse_config
   $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/3rdparty/SuiteSparse_config>
-  $<INSTALL_INTERFACE:${CMAKE_INSTALL_PREFIX}/include/gtsam/3rdparty/SuiteSparse_config>
+  $<INSTALL_INTERFACE:include/gtsam/3rdparty/SuiteSparse_config>
   # CCOLAMD
   $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/3rdparty/CCOLAMD/Include>
-  $<INSTALL_INTERFACE:${CMAKE_INSTALL_PREFIX}/include/gtsam/3rdparty/CCOLAMD>
+  $<INSTALL_INTERFACE:include/gtsam/3rdparty/CCOLAMD>
   # main gtsam includes:
   $<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}>
-  $<INSTALL_INTERFACE:${CMAKE_INSTALL_PREFIX}/include/>
+  $<INSTALL_INTERFACE:include/>
   # config.h
   $<BUILD_INTERFACE:${CMAKE_BINARY_DIR}>
   # unit tests: