diff --git a/include/sqlgen/duckdb/Connection.hpp b/include/sqlgen/duckdb/Connection.hpp
index 6c7b737..95eff62 100644
--- a/include/sqlgen/duckdb/Connection.hpp
+++ b/include/sqlgen/duckdb/Connection.hpp
@@ -23,6 +23,7 @@
 #include "../internal/remove_auto_incr_primary_t.hpp"
 #include "../internal/to_container.hpp"
 #include "../is_connection.hpp"
+#include "../sqlgen_api.hpp"
 #include "./parsing/Parser_default.hpp"
 #include "DuckDBAppender.hpp"
 #include "DuckDBConnection.hpp"
@@ -32,7 +33,7 @@
 
 namespace sqlgen::duckdb {
 
-class Connection {
+class SQLGEN_API Connection {
   using ConnPtr = Ref<DuckDBConnection>;
 
  public:
diff --git a/include/sqlgen/duckdb/DuckDBAppender.hpp b/include/sqlgen/duckdb/DuckDBAppender.hpp
index 4a42dea..3f5aa91 100644
--- a/include/sqlgen/duckdb/DuckDBAppender.hpp
+++ b/include/sqlgen/duckdb/DuckDBAppender.hpp
@@ -5,11 +5,12 @@
 
 #include <string>
 
+#include "../sqlgen_api.hpp"
 #include "DuckDBConnection.hpp"
 
 namespace sqlgen::duckdb {
 
-class DuckDBAppender {
+class SQLGEN_API DuckDBAppender {
   using ConnPtr = Ref<DuckDBConnection>;
 
  public:
diff --git a/include/sqlgen/duckdb/DuckDBConnection.hpp b/include/sqlgen/duckdb/DuckDBConnection.hpp
index ab9ebe6..be9c0d6 100644
--- a/include/sqlgen/duckdb/DuckDBConnection.hpp
+++ b/include/sqlgen/duckdb/DuckDBConnection.hpp
@@ -8,10 +8,11 @@
 
 #include "../Ref.hpp"
 #include "../Result.hpp"
+#include "../sqlgen_api.hpp"
 
 namespace sqlgen::duckdb {
 
-class DuckDBConnection {
+class SQLGEN_API DuckDBConnection {
  public:
   static Result<Ref<DuckDBConnection>> make(
       const std::optional<std::string>& _fname);
diff --git a/include/sqlgen/duckdb/DuckDBResult.hpp b/include/sqlgen/duckdb/DuckDBResult.hpp
index 14c0b39..6479e3a 100644
--- a/include/sqlgen/duckdb/DuckDBResult.hpp
+++ b/include/sqlgen/duckdb/DuckDBResult.hpp
@@ -5,11 +5,12 @@
 
 #include <string>
 
+#include "../sqlgen_api.hpp"
 #include "DuckDBConnection.hpp"
 
 namespace sqlgen::duckdb {
 
-class DuckDBResult {
+class SQLGEN_API DuckDBResult {
   using ConnPtr = Ref<DuckDBConnection>;
 
  public:
diff --git a/include/sqlgen/duckdb/to_sql.hpp b/include/sqlgen/duckdb/to_sql.hpp
index 36d8194..88656ca 100644
--- a/include/sqlgen/duckdb/to_sql.hpp
+++ b/include/sqlgen/duckdb/to_sql.hpp
@@ -4,12 +4,13 @@
 #include <string>
 
 #include "../dynamic/Statement.hpp"
+#include "../sqlgen_api.hpp"
 #include "../transpilation/to_sql.hpp"
 
 namespace sqlgen::duckdb {
 
 /// Transpiles a dynamic general SQL statement to the duckdb dialect.
-std::string to_sql_impl(const dynamic::Statement& _stmt) noexcept;
+SQLGEN_API std::string to_sql_impl(const dynamic::Statement& _stmt) noexcept;
 
 /// Transpiles any  SQL statement to the duckdb dialect.
 template <class T>