diff --git a/api/generate.go b/api/generate.go
index 707b7f620fe..5c3f5469d55 100644
--- a/api/generate.go
+++ b/api/generate.go
@@ -74,6 +74,10 @@ func Generate(cfg *config.Config, option ...Option) error {
 		return errors.Wrap(err, "merging type systems failed")
 	}
 
+	if err = codegen.GenerateCode(data); err != nil {
+		return errors.Wrap(err, "generating core failed")
+	}
+
 	for _, p := range plugins {
 		if mut, ok := p.(plugin.CodeGenerator); ok {
 			err := mut.GenerateCode(data)
@@ -83,10 +87,6 @@ func Generate(cfg *config.Config, option ...Option) error {
 		}
 	}
 
-	if err = codegen.GenerateCode(data); err != nil {
-		return errors.Wrap(err, "generating core failed")
-	}
-
 	if !cfg.SkipValidation {
 		if err := validate(cfg); err != nil {
 			return errors.Wrap(err, "validation failed")