diff --git a/package/kernel/lantiq/ltq-deu/src/ifxmips_deu_ar9.h b/package/kernel/lantiq/ltq-deu/src/ifxmips_deu_ar9.h
index 2f373589a5c..324d20012b4 100644
--- a/package/kernel/lantiq/ltq-deu/src/ifxmips_deu_ar9.h
+++ b/package/kernel/lantiq/ltq-deu/src/ifxmips_deu_ar9.h
@@ -304,4 +304,7 @@ struct deu_dma_t {
 	} controlr;
 };
 
+u32 input_swap(u32 input);
+void chip_version(void);
+
 #endif /* IFXMIPS_DEU_AR9_H */
diff --git a/package/kernel/lantiq/ltq-deu/src/ifxmips_deu_danube.h b/package/kernel/lantiq/ltq-deu/src/ifxmips_deu_danube.h
index 25561cf6e08..eb2f749bb31 100644
--- a/package/kernel/lantiq/ltq-deu/src/ifxmips_deu_danube.h
+++ b/package/kernel/lantiq/ltq-deu/src/ifxmips_deu_danube.h
@@ -255,4 +255,6 @@ struct deu_dma_t {
 	} controlr;
 };
 
+u32 input_swap(u32 input);
+
 #endif  /* IFXMIPS_DEU_DANUBE_H */