diff --git a/src/cmd/compile/internal/gc/go.go b/src/cmd/compile/internal/gc/go.go
index e9ff5aeb138..d9b8f704a93 100644
--- a/src/cmd/compile/internal/gc/go.go
+++ b/src/cmd/compile/internal/gc/go.go
@@ -145,9 +145,10 @@ var (
 	okforcap   [NTYPE]bool
 	okforlen   [NTYPE]bool
 	okforarith [NTYPE]bool
-	okforconst [NTYPE]bool
 )
 
+var okforconst [NTYPE]bool
+
 var (
 	okfor [OEND][]bool
 	iscmp [OEND]bool