--- old/src/hotspot/share/runtime/arguments.cpp	2020-01-17 11:02:35.991042310 +0100
+++ new/src/hotspot/share/runtime/arguments.cpp	2020-01-17 11:02:35.621030488 +0100
@@ -522,7 +522,6 @@
   { "AllowRedefinitionToAddDeleteMethods", JDK_Version::jdk(13), JDK_Version::undefined(), JDK_Version::undefined() },
   { "FlightRecorder",               JDK_Version::jdk(13), JDK_Version::undefined(), JDK_Version::undefined() },
   { "MonitorBound",                 JDK_Version::jdk(14), JDK_Version::jdk(15), JDK_Version::jdk(16) },
-  { "UseParallelOldGC",             JDK_Version::jdk(14), JDK_Version::jdk(15), JDK_Version::jdk(16) },
 
   // --- Deprecated alias flags (see also aliased_jvm_flags) - sorted by obsolete_in then expired_in:
   { "DefaultMaxRAMFraction",        JDK_Version::jdk(8),  JDK_Version::undefined(), JDK_Version::undefined() },
@@ -540,6 +539,7 @@
   { "UseGCTaskAffinity",             JDK_Version::undefined(), JDK_Version::jdk(14), JDK_Version::jdk(16) },
   { "GCTaskTimeStampEntries",        JDK_Version::undefined(), JDK_Version::jdk(14), JDK_Version::jdk(16) },
   { "G1RSetScanBlockSize",           JDK_Version::jdk(14),     JDK_Version::jdk(15), JDK_Version::jdk(16) },
+  { "UseParallelOldGC",              JDK_Version::jdk(14),     JDK_Version::jdk(15), JDK_Version::jdk(16) },
   { "CompactFields",                 JDK_Version::jdk(14),     JDK_Version::jdk(15), JDK_Version::jdk(16) },
   { "FieldsAllocationStyle",         JDK_Version::jdk(14),     JDK_Version::jdk(15), JDK_Version::jdk(16) },
 
@@ -4123,7 +4123,7 @@
   if (UseNUMA) {
     if (!FLAG_IS_DEFAULT(AllocateHeapAt)) {
       FLAG_SET_ERGO(UseNUMA, false);
-    } else if (UseParallelGC || UseParallelOldGC) {
+    } else if (UseParallelGC) {
       if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) {
          FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M);
       }