diff --git a/src/cpu/ppc/vm/ppc.ad b/src/cpu/ppc/vm/ppc.ad
index 173d5445139375e5baddca790103a5554befefee..cb1d75dc08bb789fa6ba08bd87d29d0ef282bcc3 100644
--- a/src/cpu/ppc/vm/ppc.ad
+++ b/src/cpu/ppc/vm/ppc.ad
@@ -2143,6 +2143,11 @@ const bool Matcher::misaligned_vectors_ok() {
   return false;
 }
 
+// PPC AES support not yet implemented
+const bool Matcher::pass_original_key_for_aes() {
+  return false;
+}
+
 // RETURNS: whether this branch offset is short enough that a short
 // branch can be used.
 //
diff --git a/src/cpu/ppc/vm/stubGenerator_ppc.cpp b/src/cpu/ppc/vm/stubGenerator_ppc.cpp
index 0fc3491531cb9d5baa2a5060fca7d9d608ab9cf6..1cd4d295925c6d1e1997fb0fe01897d71a2a13a6 100644
--- a/src/cpu/ppc/vm/stubGenerator_ppc.cpp
+++ b/src/cpu/ppc/vm/stubGenerator_ppc.cpp
@@ -2052,6 +2052,10 @@ class StubGenerator: public StubCodeGenerator {
     // arraycopy stubs used by compilers
     generate_arraycopy_stubs();
 
+    if (UseAESIntrinsics) {
+      guarantee(!UseAESIntrinsics, "not yet implemented.");
+    }
+
     // PPC uses stubs for safefetch.
     generate_safefetch("SafeFetch32", sizeof(int),     &StubRoutines::_safefetch32_entry,
                                                        &StubRoutines::_safefetch32_fault_pc,