diff --git a/plat/qemu/common/qemu_common.c b/plat/qemu/common/qemu_common.c
index 0bfb126..5dc39a1 100644
--- a/plat/qemu/common/qemu_common.c
+++ b/plat/qemu/common/qemu_common.c
@@ -258,6 +258,23 @@
 }
 #endif /* PLAT_qemu */
 
+/*
+ * Calculate checksum of 64-bit words @buffer, of @size bytes
+ */
+static uint64_t checksum_calc(uint64_t *buffer, size_t size)
+{
+	uint64_t sum = 0UL;
+
+	assert(((uintptr_t)buffer & (sizeof(uint64_t) - 1UL)) == 0UL);
+	assert((size & (sizeof(uint64_t) - 1UL)) == 0UL);
+
+	for (unsigned long i = 0UL; i < (size / sizeof(uint64_t)); i++) {
+		sum += buffer[i];
+	}
+
+	return sum;
+}
+
 int plat_rmmd_load_manifest(struct rmm_manifest *manifest)
 {
 	int i, last;
@@ -352,10 +369,12 @@
 	last = num_banks - 1;
 	for (i = 0; i < num_banks; i++) {
 		plat_get_memory_node(i, &bank_ptr[last]);
-		checksum += bank_ptr[last].base + bank_ptr[last].size;
 		last--;
 	}
 
+	checksum += checksum_calc((uint64_t *)bank_ptr,
+				  num_banks * sizeof(*bank_ptr));
+
 	/* Checksum must be 0 */
 	manifest->plat_dram.checksum = ~checksum + 1UL;
 
@@ -373,8 +392,8 @@
 	strlcpy(console_ptr[0].name, "pl011", sizeof(console_ptr[0].name));
 
 	/* Update checksum */
-	checksum += console_ptr[0].base + console_ptr[0].map_pages +
-		console_ptr[0].clk_in_hz + console_ptr[0].baud_rate;
+	checksum += checksum_calc((uint64_t *)console_ptr,
+				  num_consoles * sizeof(*console_ptr));
 
 	/* Checksum must be 0 */
 	manifest->plat_console.checksum = ~checksum + 1UL;