diff --git a/tools/dtoc/dtb_platdata.py b/tools/dtoc/dtb_platdata.py
index 2be11ff..9b27aec 100644
--- a/tools/dtoc/dtb_platdata.py
+++ b/tools/dtoc/dtb_platdata.py
@@ -673,6 +673,9 @@
         information.
         """
         self.out_header()
+        self.out('/* Allow use of U_BOOT_DEVICE() in this file */\n')
+        self.out('#define DT_PLATDATA_C\n')
+        self.out('\n')
         self.out('#include <common.h>\n')
         self.out('#include <dm.h>\n')
         self.out('#include <dt-structs.h>\n')