diff --git a/compiler/passes/parallel.cpp b/compiler/passes/parallel.cpp
index 8016b9b611f7..d9f191c058d3 100644
--- a/compiler/passes/parallel.cpp
+++ b/compiler/passes/parallel.cpp
@@ -1145,6 +1145,12 @@ makeHeapAllocations() {
           call->getStmtExpr()->insertBefore(new DefExpr(tmp));
           call->getStmtExpr()->insertBefore(new CallExpr(PRIM_MOVE, tmp, new CallExpr(PRIM_GET_MEMBER_VALUE, use->symbol(), heapType->getField(1))));
           use->replace(new SymExpr(tmp));
+          if (call->isPrimitive(PRIM_ZERO_VARIABLE)) {
+            // aftering zeroing the value, we need to set it back
+            // otherwise its a dead store
+            call->getStmtExpr()->insertAfter(
+              new CallExpr(PRIM_SET_MEMBER, use->symbol(), heapType->getField(1), tmp));
+          }
         }
       } else if (use->parentExpr)
         INT_FATAL(var, "unexpected case");
diff --git a/test/extern/ferguson/NUMLOCALES b/test/extern/ferguson/NUMLOCALES
new file mode 100644
index 000000000000..0cfbf08886fc
--- /dev/null
+++ b/test/extern/ferguson/NUMLOCALES
@@ -0,0 +1 @@
+2