diff --git a/common/fdt_support.c b/common/fdt_support.c
index 166f5e145d..33336be062 100644
--- a/common/fdt_support.c
+++ b/common/fdt_support.c
@@ -498,11 +498,12 @@ int fdt_resize(void *blob)
 
 	/*
 	 * Calculate the actual size of the fdt
-	 * plus the size needed for two fdt_add_mem_rsv, one
-	 * for the fdt itself and one for a possible initrd
+	 * plus the size needed for 5 fdt_add_mem_rsv, one
+	 * for the fdt itself and 4 for a possible initrd
+	 * ((initrd-start + initrd-end) * 2 (name & value))
 	 */
 	actualsize = fdt_off_dt_strings(blob) +
-		fdt_size_dt_strings(blob) + 2*sizeof(struct fdt_reserve_entry);
+		fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
 
 	/* Make it so the fdt ends on a page boundary */
 	actualsize = ALIGN(actualsize + ((uint)blob & 0xfff), 0x1000);