diff --git a/common/fdt_support.c b/common/fdt_support.c
index c6a76b7ad299f365d08542ed7f583f8f1f2720ea..c63b27bbb6442f4b4cbd762aeea836c1a5d415f5 100644
--- a/common/fdt_support.c
+++ b/common/fdt_support.c
@@ -1539,7 +1539,7 @@ int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
 /*
  * Returns the base address of an SOC or PCI node
  */
-u64 fdt_get_base_address(void *fdt, int node)
+u64 fdt_get_base_address(const void *fdt, int node)
 {
 	int size;
 	u32 naddr;
diff --git a/include/fdt_support.h b/include/fdt_support.h
index 955c1217133117668acdb9ee4cf3ad7fbaecde03..6fea5c7da0c3b01d4dd095e4368d60e1c816810b 100644
--- a/include/fdt_support.h
+++ b/include/fdt_support.h
@@ -207,7 +207,7 @@ int fdt_add_edid(void *blob, const char *compat, unsigned char *buf);
 
 int fdt_verify_alias_address(void *fdt, int anode, const char *alias,
 			      u64 addr);
-u64 fdt_get_base_address(void *fdt, int node);
+u64 fdt_get_base_address(const void *fdt, int node);
 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
 		   uint64_t *addr, uint64_t *len);