diff -r e92153ed8bdc -r 29b0d0b61615 src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.cpp
--- a/src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.cpp	Mon Nov 25 12:30:24 2019 +0100
+++ b/src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.cpp	Mon Nov 25 12:31:39 2019 +0100
@@ -687,7 +687,7 @@
 }
 
 void ShenandoahHeapRegion::record_pin() {
-  Atomic::add((size_t)1, &_critical_pins);
+  Atomic::add(&_critical_pins, (size_t)1);
 }
 
 void ShenandoahHeapRegion::record_unpin() {