diff --git a/file.go b/file.go
index 58beabc..d48438d 100644
--- a/file.go
+++ b/file.go
@@ -479,7 +479,13 @@ func (f *File) writeToBuffer(indent string) (*bytes.Buffer, error) {
 				}
 			}
 
-			for _, val := range shadows {
+			for i, val := range shadows {
+				// Indent is written once before the key. Repeat it for
+				// subsequent shadow keys so they keep the same indent
+				// (https://github.com/go-ini/ini/issues/367).
+				if i > 0 && len(indent) > 0 && sname != DefaultSection {
+					buf.WriteString(indent)
+				}
 				exitLoop, err := writeKeyValue(val)
 				if err != nil {
 					return nil, err
diff --git a/file_test.go b/file_test.go
index 306c0c8..f91740a 100644
--- a/file_test.go
+++ b/file_test.go
@@ -472,6 +472,31 @@ bar3 = "  val ue3 "
 bar1 = "  val ue1 "
 bar2 = "  val ue2 "
 bar3 = "  val ue3 "
+`, buf.String())
+	})
+
+	t.Run("indent shadow keys the same as the first key", func(t *testing.T) {
+		f, err := LoadSources(LoadOptions{
+			KeyValueDelimiters:       " ",
+			KeyValueDelimiterOnWrite: " ",
+			AllowShadows:             true,
+		}, []byte(`[FILTER]
+  whitelist_key   _CMDLINE
+  whitelist_key   _EXE
+  whitelist_key   _HOSTNAME
+  record          filename systemd
+`))
+		require.NoError(t, err)
+		require.NotNil(t, f)
+
+		var buf bytes.Buffer
+		_, err = f.WriteToIndent(&buf, "  ")
+		require.NoError(t, err)
+		assert.Equal(t, `[FILTER]
+  whitelist_key   _CMDLINE
+  whitelist_key   _EXE
+  whitelist_key   _HOSTNAME
+  record          filename systemd
 `, buf.String())
 	})
 }