diff --git a/common/fdt_support.c b/common/fdt_support.c
index d483d66..5a83bca 100644
--- a/common/fdt_support.c
+++ b/common/fdt_support.c
@@ -602,9 +602,12 @@
 		}
 	}
 
-	/* Calculate the actual size of the fdt */
+	/*
+	 * Calculate the actual size of the fdt
+	 * plus the size needed for fdt_add_mem_rsv
+	 */
 	actualsize = fdt_off_dt_strings(blob) +
-		fdt_size_dt_strings(blob);
+		fdt_size_dt_strings(blob) + sizeof(struct fdt_reserve_entry);
 
 	/* Make it so the fdt ends on a page boundary */
 	actualsize = ALIGN(actualsize, 0x1000);