--- old/src/hotspot/share/classfile/classLoaderDataGraph.inline.hpp	2019-11-21 11:52:55.814699617 +0100
+++ new/src/hotspot/share/classfile/classLoaderDataGraph.inline.hpp	2019-11-21 11:52:55.554695370 +0100
@@ -50,7 +50,7 @@
 }
 
 void ClassLoaderDataGraph::inc_instance_classes(size_t count) {
-  Atomic::add(count, &_num_instance_classes);
+  Atomic::add(&_num_instance_classes, count);
 }
 
 void ClassLoaderDataGraph::dec_instance_classes(size_t count) {
@@ -59,7 +59,7 @@
 }
 
 void ClassLoaderDataGraph::inc_array_classes(size_t count) {
-  Atomic::add(count, &_num_array_classes);
+  Atomic::add(&_num_array_classes, count);
 }
 
 void ClassLoaderDataGraph::dec_array_classes(size_t count) {