diff --git a/mediapipe/calculators/core/BUILD b/mediapipe/calculators/core/BUILD
index 29bca5fa6..2c143a609 100644
--- a/mediapipe/calculators/core/BUILD
+++ b/mediapipe/calculators/core/BUILD
@@ -1323,6 +1323,7 @@ cc_library(
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/api2:node",
         "//mediapipe/framework/api2:port",
+        "//mediapipe/framework/formats:detection_cc_proto",
         "//mediapipe/framework/formats:image",
         "@com_google_absl//absl/status",
     ],
diff --git a/mediapipe/calculators/core/merge_to_vector_calculator.cc b/mediapipe/calculators/core/merge_to_vector_calculator.cc
index 5f05ad725..fd053ed2b 100644
--- a/mediapipe/calculators/core/merge_to_vector_calculator.cc
+++ b/mediapipe/calculators/core/merge_to_vector_calculator.cc
@@ -15,6 +15,7 @@ limitations under the License.
 
 #include "mediapipe/calculators/core/merge_to_vector_calculator.h"
 
+#include "mediapipe/framework/formats/detection.pb.h"
 #include "mediapipe/framework/formats/image.h"
 
 namespace mediapipe {
@@ -27,5 +28,9 @@ typedef MergeToVectorCalculator<mediapipe::GpuBuffer>
     MergeGpuBuffersToVectorCalculator;
 MEDIAPIPE_REGISTER_NODE(MergeGpuBuffersToVectorCalculator);
 
+typedef MergeToVectorCalculator<mediapipe::Detection>
+    MergeDetectionsToVectorCalculator;
+MEDIAPIPE_REGISTER_NODE(MergeDetectionsToVectorCalculator);
+
 }  // namespace api2
 }  // namespace mediapipe