diff --git a/cmake/xo_cxx.cmake b/cmake/xo_cxx.cmake
index 7eaaaff9..da93eccb 100644
--- a/cmake/xo_cxx.cmake
+++ b/cmake/xo_cxx.cmake
@@ -64,7 +64,7 @@ macro(xo_include_headeronly_options2 target)
       $<INSTALL_INTERFACE:include>
       $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include/${target}>    # e.g. for #include "Refcounted.hpp" in refcnt/src when ${target}=refcnt [DEPRECATED]
       $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include/xo/${target}>    # e.g. for #include "TypeDescr.hpp" in reflect/src when ${target}=reflect
-      $<INSTALL_INTERFACE:include/${target}>
+#      $<INSTALL_INTERFACE:include/xo/${target}>
       $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}>                      # e.g. for generated .hpp files
     )
 
@@ -126,7 +126,7 @@ macro(xo_include_options2 target)
       $<INSTALL_INTERFACE:include>
       $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include/${target}>    # e.g. for #include "Refcounted.hpp" in refcnt/src [DEPRECATED]
       $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include/xo/${target}>    # e.g. for #include "TypeDescr.hpp" in reflect/src when ${target}=reflect
-      $<INSTALL_INTERFACE:include/${target}>
+#      $<INSTALL_INTERFACE:include/xo/${target}>
       $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}>                      # e.g. for generated .hpp files
     )