diff --git a/media/codec2/sfplugin/CCodecConfig.cpp b/media/codec2/sfplugin/CCodecConfig.cpp
index d95e61f..c9bb3bd 100644
--- a/media/codec2/sfplugin/CCodecConfig.cpp
+++ b/media/codec2/sfplugin/CCodecConfig.cpp
@@ -965,6 +965,16 @@
             return value == 0 ? C2_FALSE : C2_TRUE;
         }));
 
+    add(ConfigMapper("android._tunnel-peek-set-legacy", C2_PARAMKEY_TUNNEL_PEEK_MODE, "value")
+        .limitTo(D::PARAM & D::VIDEO & D::DECODER)
+        .withMapper([](C2Value v) -> C2Value {
+          int32_t value = 0;
+          (void)v.get(&value);
+          return value == 0
+              ? C2Value(C2PlatformConfig::SPECIFIED_PEEK)
+              : C2Value(C2PlatformConfig::UNSPECIFIED_PEEK);
+        }));
+
     add(ConfigMapper(KEY_VIDEO_QP_AVERAGE, C2_PARAMKEY_AVERAGE_QP, "value")
         .limitTo(D::ENCODER & D::VIDEO & D::READ));