diff --git a/src/cmd/dist/buildtool.go b/src/cmd/dist/buildtool.go
index 6f16fc976f..13a4f90c30 100644
--- a/src/cmd/dist/buildtool.go
+++ b/src/cmd/dist/buildtool.go
@@ -36,9 +36,10 @@ var bootstrapDirs = []string{
 	"compile/internal/gc",
 	"compile/internal/mips64",
 	"compile/internal/ppc64",
-	"compile/internal/ssa",
-	"compile/internal/x86",
 	"compile/internal/s390x",
+	"compile/internal/ssa",
+	"compile/internal/syntax",
+	"compile/internal/x86",
 	"internal/bio",
 	"internal/gcprog",
 	"internal/dwarf",