diff --git a/CMakeLists.txt b/CMakeLists.txt
index d148b38e..f2a60a57 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -36,8 +36,9 @@ add_subdirectory(utest)
 # ----------------------------------------------------------------
 # header-only library
 
-set(SELF_LIB xo_ordinaltree)
-xo_add_headeronly_library(${SELF_LIB})
+set(SELF_SHORTNAME ordinaltree)
+set(SELF_LIB xo_${SELF_SHORTNAME})
+xo_add_headeronly_library5(${SELF_LIB} ${SELF_SHORTNAME})
 
 # ----------------------------------------------------------------
 #