diff --git a/profiles/templates/3.5/6_ac_update_sync/world/grp/sys-devel b/profiles/templates/3.5/6_ac_update_sync/world/grp/sys-devel
index e4de0bbb..7d722dac 100644
--- a/profiles/templates/3.5/6_ac_update_sync/world/grp/sys-devel
+++ b/profiles/templates/3.5/6_ac_update_sync/world/grp/sys-devel
@@ -3,4 +3,5 @@
 #?in(os_linux_pkglist, CB4)!=#
 #-world(#-cl_pass_file-#)-#
 !!clang-runtime:4.0.1
+!!gcc:6.4.0
 #in#