diff --git a/compiler/compiler.go b/compiler/compiler.go
index 2a5b80a3..ef2fd416 100644
--- a/compiler/compiler.go
+++ b/compiler/compiler.go
@@ -37,6 +37,7 @@ var functionsUsedInTransforms = []string{
 	"runtime.alloc",
 	"runtime.free",
 	"runtime.sleepTask",
+	"runtime.sleepCurrentTask",
 	"runtime.setTaskStatePtr",
 	"runtime.getTaskStatePtr",
 	"runtime.activateTask",
diff --git a/compiler/goroutine-lowering.go b/compiler/goroutine-lowering.go
index 34a1c879..30abb23d 100644
--- a/compiler/goroutine-lowering.go
+++ b/compiler/goroutine-lowering.go
@@ -150,6 +150,10 @@ func (c *Compiler) lowerTasks() error {
 		zero := llvm.ConstInt(c.uintptrType, 0, false)
 		c.createRuntimeCall("startGoroutine", []llvm.Value{realMainWrapper, zero}, "")
 		c.createRuntimeCall("scheduler", nil, "")
+		sleep := c.mod.NamedFunction("time.Sleep")
+		if !sleep.IsNil() {
+			sleep.ReplaceAllUsesWith(c.mod.NamedFunction("runtime.sleepCurrentTask"))
+		}
 	} else {
 		// Program doesn't need a scheduler. Call main.main directly.
 		c.builder.SetInsertPointBefore(mainCall)
diff --git a/src/runtime/scheduler_tasks.go b/src/runtime/scheduler_tasks.go
index 2d833c5e..8f118921 100644
--- a/src/runtime/scheduler_tasks.go
+++ b/src/runtime/scheduler_tasks.go
@@ -98,6 +98,12 @@ func startGoroutine(fn, args uintptr) {
 
 //go:linkname sleep time.Sleep
 func sleep(d int64) {
+	sleepTicks(timeUnit(d / tickMicros))
+}
+
+// sleepCurrentTask suspends the current goroutine. This is a compiler
+// intrinsic. It replaces calls to time.Sleep when a scheduler is in use.
+func sleepCurrentTask(d int64) {
 	sleepTask(currentTask, d)
 	swapTask(currentTask, &schedulerState)
 }