diff --git a/build_sdk.py b/build_sdk.py
index 92cc5bfcb..e6d3e38ae 100644
--- a/build_sdk.py
+++ b/build_sdk.py
@@ -393,9 +393,9 @@ class KernelPath:
         arch=KernelArch.AARCH64,
         gcc_cpu="cortex-a53",
         loader_link_address=0x30000000,
-        # ROCKPRO64 has 4 Cortex-A53 cores and 2 Cortex-A72 cores,
-        # we always run on the Cortex-A53s.
-        smp_cores=4,
+        # ROCKPRO64 has 4 Cortex-A53 cores and 2 Cortex-A72 cores in two clusters.
+        # The non-SMP configuration runs on the first A53 core.
+        smp_cores=6,
         kernel_options={
             "KernelPlatform": "rockpro64",
         },
diff --git a/loader/src/aarch64/cpus.c b/loader/src/aarch64/cpus.c
index 9e66ff733..327ab9b20 100644
--- a/loader/src/aarch64/cpus.c
+++ b/loader/src/aarch64/cpus.c
@@ -62,7 +62,7 @@ static const size_t psci_target_cpus[4] = {0x00, 0x01, 0x02, 0x03};
 #elif defined(CONFIG_PLAT_ODROIDC4)
 static const size_t psci_target_cpus[4] = {0x00, 0x01, 0x02, 0x03};
 #elif defined(CONFIG_PLAT_ROCKPRO64)
-static const size_t psci_target_cpus[4] = {0x00, 0x01, 0x02, 0x03};
+static const size_t psci_target_cpus[6] = {0x00, 0x01, 0x02, 0x03, 0x100, 0x101};
 #elif defined(CONFIG_PLAT_STM32MP2)
 static const size_t psci_target_cpus[2] = {0x00, 0x01};
 #elif defined(CONFIG_PLAT_QEMU_ARM_VIRT)