diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5aed94f..9bfcff9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -212,7 +212,7 @@ include(Configure)
 
 configure_file(${AUTOCONFIG_SRC} ${AUTOCONFIG} @ONLY)
 
-set(INCLUDE_DIR "${CMAKE_INSTALL_PREFIX}/include" "${CMAKE_INSTALL_PREFIX}/include/leptonica")
+set(INCLUDE_DIR "\${CMAKE_CURRENT_LIST_DIR}/../../include" "\${CMAKE_CURRENT_LIST_DIR}/../../include/leptonica")
 
 ###############################################################################
 #