diff --git a/analyzer.go b/analyzer.go
index b8eac15..6ac49c8 100644
--- a/analyzer.go
+++ b/analyzer.go
@@ -2,6 +2,7 @@ package wsl
 
 import (
 	"flag"
+	"go/ast"
 	"strings"
 
 	"golang.org/x/tools/go/analysis"
@@ -75,6 +76,10 @@ func (wa *wslAnalyzer) flags() flag.FlagSet {
 
 func (wa *wslAnalyzer) run(pass *analysis.Pass) (interface{}, error) {
 	for _, file := range pass.Files {
+		if ast.IsGenerated(file) {
+			continue
+		}
+
 		filename := pass.Fset.PositionFor(file.Pos(), false).Filename
 		if !strings.HasSuffix(filename, ".go") {
 			continue
diff --git a/testdata/src/default_config/generated.go b/testdata/src/default_config/generated.go
new file mode 100644
index 0000000..b93e418
--- /dev/null
+++ b/testdata/src/default_config/generated.go
@@ -0,0 +1,21 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+
+package chat
+
+func _ChatService_SayHello_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(Message)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ChatServiceServer).SayHello(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/go.grpc.http.muxer.com.chat.v1.ChatService/SayHello",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ChatServiceServer).SayHello(ctx, req.(*Message))
+	}
+	return interceptor(ctx, in, info, handler)
+}
diff --git a/testdata/src/default_config/generated.go.golden b/testdata/src/default_config/generated.go.golden
new file mode 100644
index 0000000..b93e418
--- /dev/null
+++ b/testdata/src/default_config/generated.go.golden
@@ -0,0 +1,21 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+
+package chat
+
+func _ChatService_SayHello_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(Message)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ChatServiceServer).SayHello(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/go.grpc.http.muxer.com.chat.v1.ChatService/SayHello",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ChatServiceServer).SayHello(ctx, req.(*Message))
+	}
+	return interceptor(ctx, in, info, handler)
+}