diff --git a/src/runtime/proc.go b/src/runtime/proc.go
new file mode 100644
index 0000000000..e029ffe95f
--- /dev/null
+++ b/src/runtime/proc.go
@@ -0,0 +1,19 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package runtime
+
+// Called from syscall package before Exec.
+//
+//go:linkname syscall_runtime_BeforeExec syscall.runtime_BeforeExec
+func syscall_runtime_BeforeExec() {
+	// Used in BigGo to serialize exec / thread creation. Stubbing to
+	// satisfy link.
+}
+
+// Called from syscall package after Exec.
+//
+//go:linkname syscall_runtime_AfterExec syscall.runtime_AfterExec
+func syscall_runtime_AfterExec() {
+}