diff --git a/src/tests/vm/parallel-merge.h b/src/tests/vm/parallel-merge.h
new file mode 100644
index 0000000000000000000000000000000000000000..a6b6431c1de6e39d7a9ae312ad9d3b2f2df57b81
--- /dev/null
+++ b/src/tests/vm/parallel-merge.h
@@ -0,0 +1,6 @@
+#ifndef TESTS_VM_PARALLEL_MERGE
+#define TESTS_VM_PARALLEL_MERGE 1
+
+void parallel_merge (const char *child_name, int exit_status);
+
+#endif /* tests/vm/parallel-merge.h */