diff --git a/src/cmd/compile/internal/gc/pgen.go b/src/cmd/compile/internal/gc/pgen.go
index fdf3bf7847..355df9d326 100644
--- a/src/cmd/compile/internal/gc/pgen.go
+++ b/src/cmd/compile/internal/gc/pgen.go
@@ -16,6 +16,7 @@ import (
 	"math/rand"
 	"sort"
 	"sync"
+	"time"
 )
 
 // "Portable" code generation.
@@ -249,6 +250,12 @@ func compileSSA(fn *Node, worker int) {
 	pp.Free()
 }
 
+func init() {
+	if raceEnabled {
+		rand.Seed(time.Now().UnixNano())
+	}
+}
+
 // compileFunctions compiles all functions in compilequeue.
 // It fans out nBackendWorkers to do the work
 // and waits for them to complete.