Fixing cmake header install path

Signed-off-by: Ralph Giles <giles@thaumas.net>
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 78cc082..8cdf478 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -100,6 +100,6 @@
 
 configure_pkg_config_file(ogg.pc.in)
 
-install(FILES include/ogg/ogg.h include/ogg/os_types.h include/ogg/config_types.h DESTINATION ${CMAKE_INSTALL_FULL_INCLUDEDIR})
+install(FILES include/ogg/ogg.h include/ogg/os_types.h include/ogg/config_types.h DESTINATION ${CMAKE_INSTALL_FULL_INCLUDEDIR}/ogg)
 install(TARGETS ogg RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR} LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR} FRAMEWORK DESTINATION ${CMAKE_INSTALL_LIBDIR})
 install(FILES ogg.pc DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
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