diff --git a/internal/cgen/cgen.go b/internal/cgen/cgen.go
index ea572f7..b7d6e21 100644
--- a/internal/cgen/cgen.go
+++ b/internal/cgen/cgen.go
@@ -577,6 +577,11 @@
 	return *b, nil
 }
 
+var (
+	wiStartImpl = []byte("\n// WUFFS C HEADER ENDS HERE.\n#ifdef WUFFS_IMPLEMENTATION\n\n")
+	wiEnd       = []byte("\n#endif  // WUFFS_IMPLEMENTATION\n\n")
+)
+
 func (g *gen) genIncludes(b *buffer) error {
 	b.writes("#if defined(WUFFS_IMPLEMENTATION) && !defined(WUFFS_CONFIG__MODULES)\n")
 	b.writes("#define WUFFS_CONFIG__MODULES\n")
@@ -1122,13 +1127,6 @@
 	return nil
 }
 
-var (
-	wiStartImpl = []byte("\n// WUFFS C HEADER ENDS HERE.\n#ifdef WUFFS_IMPLEMENTATION\n\n")
-	wiStart     = []byte("\n#ifdef WUFFS_IMPLEMENTATION\n\n")
-	wiElse      = []byte("\n#else   // WUFFS_IMPLEMENTATION\n\n")
-	wiEnd       = []byte("\n#endif  // WUFFS_IMPLEMENTATION\n\n")
-)
-
 func (g *gen) writeVTableImpl(b *buffer, n *a.Struct) error {
 	impls := n.Implements()
 	if len(impls) == 0 {