diff --git a/meta/classes/package.bbclass b/meta/classes/package.bbclass
index a14561d5ac..73c4358aff 100644
--- a/meta/classes/package.bbclass
+++ b/meta/classes/package.bbclass
@@ -1763,7 +1763,10 @@ python package_depchains() {
 
     if "-dbg" in pkgs:
         pkglibdeps = read_libdep_files(d)
-        pkglibdeplist = pkglibdeps.keys()
+        pkglibdeplist = []
+        for pkg in pkglibdeps:
+            for k in pkglibdeps[pkg]:
+                add_dep(pkglibdeplist, k)
         # FIXME this should not look at PN once all task recipes inherit from task.bbclass
         dbgdefaultdeps = ((d.getVar('DEPCHAIN_DBGDEFAULTDEPS', True) == '1') or (d.getVar('PN', True) or '').startswith('packagegroup-'))