diff --git a/internal/pkgdoc/dir.go b/internal/pkgdoc/dir.go
index 6a10baf..e8b2c61 100644
--- a/internal/pkgdoc/dir.go
+++ b/internal/pkgdoc/dir.go
@@ -143,8 +143,7 @@
 	var dirs []*Dir
 
 	for _, d := range list {
-		name := d.Name()
-		filename := path.Join(abspath, name)
+		filename := path.Join(abspath, d.Name())
 		switch {
 		case isPkgDir(d):
 			dir := newDir(fsys, fset, filename)
@@ -169,7 +168,7 @@
 				// prioritize documentation
 				i := -1
 				switch file.Name.Name {
-				case name:
+				case path.Base(abspath):
 					i = 0 // normal case: directory name matches package name
 				case "main":
 					i = 1 // directory contains a main package
diff --git a/internal/pkgdoc/dir_test.go b/internal/pkgdoc/dir_test.go
index b7b56d5..9441274 100644
--- a/internal/pkgdoc/dir_test.go
+++ b/internal/pkgdoc/dir_test.go
@@ -13,6 +13,7 @@
 	"runtime"
 	"sort"
 	"testing"
+	"testing/fstest"
 )
 
 func TestNewDirTree(t *testing.T) {
@@ -33,6 +34,24 @@
 	}
 }
 
+func TestIssue45614(t *testing.T) {
+	fs := fstest.MapFS{
+		"src/index/suffixarray/gen.go": {
+			Data: []byte(`// P1: directory contains a main package
+package main
+`)},
+		"src/index/suffixarray/suffixarray.go": {
+			Data: []byte(`// P0: directory name matches package name
+package suffixarray
+`)},
+	}
+
+	dir := newDir(fs, token.NewFileSet(), "src/index/suffixarray")
+	if got, want := dir.Synopsis, "P0: directory name matches package name"; got != want {
+		t.Errorf("dir.Synopsis = %q; want %q", got, want)
+	}
+}
+
 func BenchmarkNewDirectory(b *testing.B) {
 	if testing.Short() {
 		b.Skip("not running tests requiring large file scan in short mode")