diff --git a/README.txt b/README.txt
index 49a3eda..bd797be 100644
--- a/README.txt
+++ b/README.txt
@@ -4,7 +4,7 @@ INSTALL: go get github.com/akavel/rsrc
 
 USAGE:
 
-rsrc.exe [-manifest FILE.exe.manifest] [-ico FILE.ico[,FILE2.ico...]] -o FILE.syso
+rsrc.exe [-manifest FILE.exe.manifest] [-ico FILE.ico[,FILE2.ico...]] [OPTIONS...]
   Generates a .syso file with specified resources embedded in .rsrc section,
   aimed for consumption by Go linker when building Win32 excecutables.
 
@@ -20,7 +20,7 @@ OPTIONS:
   -manifest string
     	path to a Windows manifest file to embed
   -o string
-    	name of output COFF (.res or .syso) file (default "rsrc.syso")
+    	name of output COFF (.res or .syso) file; if set to empty, will default to 'rsrc_windows_{arch}.syso'
 
 Based on ideas presented by Minux.
 
diff --git a/rsrc.go b/rsrc.go
index 73681c0..5c3d44f 100644
--- a/rsrc.go
+++ b/rsrc.go
@@ -10,7 +10,7 @@ import (
 
 var usage = `USAGE:
 
-%s [-manifest FILE.exe.manifest] [-ico FILE.ico[,FILE2.ico...]] -o FILE.syso
+%s [-manifest FILE.exe.manifest] [-ico FILE.ico[,FILE2.ico...]] [OPTIONS...]
   Generates a .syso file with specified resources embedded in .rsrc section,
   aimed for consumption by Go linker when building Win32 excecutables.
 
@@ -28,17 +28,20 @@ func main() {
 	flags := flag.NewFlagSet("", flag.ExitOnError)
 	flags.StringVar(&fnamein, "manifest", "", "path to a Windows manifest file to embed")
 	flags.StringVar(&fnameico, "ico", "", "comma-separated list of paths to .ico files to embed")
-	flags.StringVar(&fnameout, "o", "rsrc.syso", "name of output COFF (.res or .syso) file")
+	flags.StringVar(&fnameout, "o", "", "name of output COFF (.res or .syso) file; if set to empty, will default to 'rsrc_windows_{arch}.syso'")
 	flags.StringVar(&arch, "arch", "386", "architecture of output file - one of: 386, amd64, [EXPERIMENTAL: arm, arm64]")
 	flags.Usage = func() {
 		fmt.Fprintf(os.Stderr, usage, os.Args[0])
 		flags.PrintDefaults()
 	}
 	_ = flags.Parse(os.Args[1:])
-	if fnameout == "" || (fnamein == "" && fnameico == "") {
+	if fnamein == "" && fnameico == "" {
 		flags.Usage()
 		os.Exit(1)
 	}
+	if fnameout == "" {
+		fnameout = "rsrc_windows_" + arch + ".syso"
+	}
 
 	err := rsrc.Embed(fnameout, arch, fnamein, fnameico)
 	if err != nil {
diff --git a/rsrc_test.go b/rsrc_test.go
index d59997f..498e280 100644
--- a/rsrc_test.go
+++ b/rsrc_test.go
@@ -8,7 +8,7 @@ import (
 	"testing"
 )
 
-const name = "rsrc.syso"
+const name = "rsrc_windows_amd64.syso"
 
 func TestBuildSucceeds(t *testing.T) {
 	tests := []struct {
@@ -35,7 +35,7 @@ func TestBuildSucceeds(t *testing.T) {
 			// Compile icon/manifest in testdata/ dir
 			os.Stdout.Write([]byte("-- compiling resource(s)...\n"))
 			defer os.Remove(filepath.Join(dir, name))
-			cmd := exec.Command("go", "run", "../rsrc.go", "-arch", "amd64", "-o", name)
+			cmd := exec.Command("go", "run", "../rsrc.go", "-arch", "amd64")
 			cmd.Args = append(cmd.Args, tt.args...)
 			cmd.Dir = dir
 			cmd.Stdout = os.Stdout
@@ -45,6 +45,12 @@ func TestBuildSucceeds(t *testing.T) {
 				t.Fatal(err)
 			}
 
+			// Verify if a .syso file with default name was created
+			_, err = os.Stat(filepath.Join(dir, name))
+			if err != nil {
+				t.Fatal(err)
+			}
+
 			defer os.Setenv("GOOS", os.Getenv("GOOS"))
 			defer os.Setenv("GOARCH", os.Getenv("GOARCH"))
 			os.Setenv("GOOS", "windows")