diff --git a/src/google/protobuf/repeated_ptr_field.cc b/src/google/protobuf/repeated_ptr_field.cc
index e50ab2a..b0bf875 100644
--- a/src/google/protobuf/repeated_ptr_field.cc
+++ b/src/google/protobuf/repeated_ptr_field.cc
@@ -171,6 +171,7 @@ PROTOBUF_ALWAYS_INLINE void RepeatedPtrFieldBase::MergeFromInternal(
 }
 
 template <>
+PROTOBUF_EXPORT_TEMPLATE_DEFINE
 void RepeatedPtrFieldBase::MergeFrom<std::string>(
     const RepeatedPtrFieldBase& from, Arena* arena) {
   MergeFromInternal<std::string>(
@@ -227,6 +228,7 @@ void RepeatedPtrFieldBase::MergeFromConcreteMessage(
 }
 
 template <>
+PROTOBUF_EXPORT_TEMPLATE_DEFINE
 void RepeatedPtrFieldBase::MergeFrom<MessageLite>(
     const RepeatedPtrFieldBase& from, Arena* arena) {
   ABSL_DCHECK(from.current_size_ > 0);