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 doc/CMakeLists.txt | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/doc/CMakeLists.txt b/doc/CMakeLists.txt
index 2d8eb24..aeac8ed 100644
--- a/doc/CMakeLists.txt
+++ b/doc/CMakeLists.txt
@@ -1,4 +1,8 @@
 find_package(LATEX)
+
+if (NOT DOCDIR)
+  set(DOCDIR share/doc/flann)
+endif ()
  
 if (EXISTS ${PDFLATEX_COMPILER} AND EXISTS ${BIBTEX_COMPILER})
     include(${PROJECT_SOURCE_DIR}/cmake/UseLATEX.cmake)
@@ -14,6 +18,6 @@ endif()
 
 install(
     FILES manual.pdf
-    DESTINATION share/doc/flann
+    DESTINATION ${DOCDIR}
     OPTIONAL
 )