diff --git a/src/runtime/mgc.go b/src/runtime/mgc.go
index 8475d168d88..f1112a6ae32 100644
--- a/src/runtime/mgc.go
+++ b/src/runtime/mgc.go
@@ -628,10 +628,12 @@ func (c *gcControllerState) endCycle() {
 //go:nowritebarrier
 func (c *gcControllerState) enlistWorker() {
 	// If there are idle Ps, wake one so it will run an idle worker.
-	if atomic.Load(&sched.npidle) != 0 && atomic.Load(&sched.nmspinning) == 0 {
-		wakep()
-		return
-	}
+	// NOTE: This is suspected of causing deadlocks. See golang.org/issue/19112.
+	//
+	//	if atomic.Load(&sched.npidle) != 0 && atomic.Load(&sched.nmspinning) == 0 {
+	//		wakep()
+	//		return
+	//	}
 
 	// There are no idle Ps. If we need more dedicated workers,
 	// try to preempt a running P so it will switch to a worker.