diff --git a/conf/layer.conf b/conf/layer.conf
index 87a28de7..4c2cf5fc 100644
--- a/conf/layer.conf
+++ b/conf/layer.conf
@@ -29,4 +29,4 @@ SIGGEN_EXCLUDERECIPES_ABISAFE += " \
 "
 
 # Required by openmp-rtos "docs" target
-HOSTTOOLS += "doxygen"
+HOSTTOOLS_NONFATAL += "doxygen"