diff --git a/sqlite3.go b/sqlite3.go
index 545064c..f60c628 100644
--- a/sqlite3.go
+++ b/sqlite3.go
@@ -26,6 +26,7 @@ package sqlite3
 #cgo openbsd LDFLAGS: -L/usr/local/lib
 #ifndef USE_LIBSQLITE3
 #include "amalgamation/sqlite3-binding.h"
+#include "amalgamation/sqlite3-binding.c"
 #else
 #include <sqlite3.h>
 #endif
diff --git a/sqlite3_opt_unlock_notify.go b/sqlite3_opt_unlock_notify.go
index effeb90..1b0b648 100644
--- a/sqlite3_opt_unlock_notify.go
+++ b/sqlite3_opt_unlock_notify.go
@@ -13,6 +13,7 @@ package sqlite3
 
 #include <stdlib.h>
 #include "amalgamation/sqlite3-binding.h"
+#include "amalgamation/sqlite3_opt_unlock_notify.c"
 
 extern void unlock_notify_callback(void *arg, int argc);
 */