diff --git a/exec.go b/exec.go
index eadaab4..9a99878 100644
--- a/exec.go
+++ b/exec.go
@@ -39,7 +39,7 @@ func (p *Project) goCompile(stop <-chan bool, method []string, args []string) (s
 	case <-stop:
 		// Stop running command
 		cmd.Process.Kill()
-		return "killed", nil
+		return msgStop, nil
 	case err := <-done:
 		// Command completed
 		if err != nil {
@@ -77,14 +77,14 @@ func (p *Project) goRun(stop <-chan bool, runner chan bool) {
 
 	if _, err := os.Stat(filepath.Join(getEnvPath("GOBIN"), filepath.Base(p.path))); err == nil {
 		build = exec.Command(filepath.Join(getEnvPath("GOBIN"), filepath.Base(p.path)), args...)
-	} else if _, err := os.Stat(filepath.Join(getEnvPath("GOBIN"), filepath.Base(p.path)) + ".exe"); err == nil {
-		build = exec.Command(filepath.Join(getEnvPath("GOBIN"), filepath.Base(p.path))+".exe", args...)
+	} else if _, err := os.Stat(filepath.Join(getEnvPath("GOBIN"), filepath.Base(p.path)) + extWindows); err == nil {
+		build = exec.Command(filepath.Join(getEnvPath("GOBIN"), filepath.Base(p.path))+extWindows, args...)
 	} else {
 		path := filepath.Join(p.base, filepath.Base(p.path))
 		if _, err = os.Stat(path); err == nil {
 			build = exec.Command(path, args...)
-		} else if _, err = os.Stat(path + ".exe"); err == nil {
-			build = exec.Command(path+".exe", args...)
+		} else if _, err = os.Stat(path + extWindows); err == nil {
+			build = exec.Command(path+extWindows, args...)
 		} else {
 			p.Buffer.StdLog = append(p.Buffer.StdLog, BufferOut{Time: time.Now(), Text: "Can't run a not compiled project"})
 			p.fatal(nil, "Can't run a not compiled project", ":")
diff --git a/exec_test.go b/exec_test.go
index 6a511cc..8599c4f 100644
--- a/exec_test.go
+++ b/exec_test.go
@@ -20,7 +20,7 @@ func TestProject_GoCompile(t *testing.T) {
 	close(stop)
 	select {
 	case v := <-response:
-		if v != "killed" {
+		if v != msgStop {
 			t.Error("Unexpected result", response)
 		}
 	case <-time.After(2 * time.Second):
diff --git a/watcher.go b/watcher.go
index 305f0a3..aab8193 100644
--- a/watcher.go
+++ b/watcher.go
@@ -21,6 +21,11 @@ var (
 	wg  sync.WaitGroup
 )
 
+const (
+	msgStop    = "killed"
+	extWindows = extWindows
+)
+
 // Watch struct defines options for livereload
 type Watch struct {
 	Preview bool      `yaml:"preview,omitempty" json:"preview,omitempty"`
@@ -215,7 +220,7 @@ func (p *Project) compile(stop <-chan bool, cmd Cmd) error {
 		go func() {
 			log.Println(p.pname(p.Name, 1), ":", cmd.startTxt)
 			stream, err := p.goCompile(stop, cmd.method, cmd.Args)
-			if stream != "killed" {
+			if stream != msgStop {
 				channel <- Result{stream, err}
 			}
 		}()