diff --git a/classes/populate_sdk_qt6_base.bbclass b/classes/populate_sdk_qt6_base.bbclass
index 676f3d1..b279490 100644
--- a/classes/populate_sdk_qt6_base.bbclass
+++ b/classes/populate_sdk_qt6_base.bbclass
@@ -141,4 +141,4 @@ EOF
 
 # default debug prefix map isn't valid in the SDK
 DEBUG_PREFIX_MAP = ""
-SECURITY_CFLAGS = ""
+lcl_maybe_fortify = ""