diff --git a/share/cmake/app4triqs-config.cmake.in b/share/cmake/app4triqs-config.cmake.in
index 4a7f1629..43d44035 100644
--- a/share/cmake/app4triqs-config.cmake.in
+++ b/share/cmake/app4triqs-config.cmake.in
@@ -4,7 +4,8 @@
 
 # Multiple inclusion guard
 if(NOT APP4TRIQS_FOUND)
-set(APP4TRIQS_FOUND True)
+set(APP4TRIQS_FOUND TRUE)
+set_property(GLOBAL PROPERTY APP4TRIQS_FOUND TRUE)
 
 # version
 set(APP4TRIQS_VERSION @PROJECT_VERSION@)