diff --git a/cl/multifiles.go b/cl/multifiles.go
index 62d7847..d20966e 100644
--- a/cl/multifiles.go
+++ b/cl/multifiles.go
@@ -73,10 +73,24 @@ func (p *blockCtx) getSuName(v *ast.Node, tag string) (string, int) {
 }
 
 func (p *blockCtx) autoStaticName(name string) string {
+	if file := p.srcfile; file != "" {
+		return name + "_" + baseOfFile(file)
+	}
 	*p.base++
 	return name + "_cgo" + strconv.Itoa(*p.base)
 }
 
+func baseOfFile(file string) string {
+	base := filepath.Base(file)
+	pos := strings.IndexFunc(base, func(r rune) bool {
+		return !(r >= 'a' && r <= 'z' || r >= 'A' && r <= 'Z' || r >= '0' && r <= '9' || r == '_')
+	})
+	if pos > 0 {
+		base = base[:pos]
+	}
+	return base
+}
+
 func (p *blockCtx) logFile(node *ast.Node) {
 	if f := node.Loc.PresumedFile; f != "" {
 		if p.hasMulti {
diff --git a/cl/multifiles_test.go b/cl/multifiles_test.go
index 1fb99de..10991b0 100644
--- a/cl/multifiles_test.go
+++ b/cl/multifiles_test.go
@@ -19,3 +19,9 @@ func TestInitDepPkgs(t *testing.T) {
 		initDepPkgs(pkg, deps)
 	})
 }
+
+func TestBaseOfFile(t *testing.T) {
+	if ret := baseOfFile("src/errno/strerror.c.i"); ret != "strerror" {
+		t.Fatal("baseOfFile:", ret)
+	}
+}