new file mode 100644
--- /dev/null
+++ b/src/os/unix/ngx_dlopen.c
@@ -0,0 +1,28 @@
+
+/*
+ * Copyright (C) Maxim Dounin
+ * Copyright (C) Nginx, Inc.
+ */
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+
+
+#if (NGX_HAVE_DLOPEN)
+
+char *
+ngx_dlerror(void)
+{
+    char  *err;
+
+    err = (char *) dlerror();
+
+    if (err == NULL) {
+        return "";
+    }
+
+    return err;
+}
+
+#endif