diff --git a/spm/cactus/cactus_interrupt.c b/spm/cactus/cactus_interrupt.c
new file mode 100644
index 0000000..c7ad269
--- /dev/null
+++ b/spm/cactus/cactus_interrupt.c
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2021, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <debug.h>
+
+#include <ffa_helpers.h>
+#include <sp_helpers.h>
+
+int cactus_irq_handler(void)
+{
+	uint32_t irq_num;
+
+	irq_num = spm_interrupt_get();
+
+	ERROR("%s: Interrupt ID %u not handled!\n", __func__, irq_num);
+
+	return 0;
+}
+
+int cactus_fiq_handler(void)
+{
+	uint32_t fiq_num;
+
+	fiq_num = spm_interrupt_get();
+
+	ERROR("%s: Interrupt ID %u not handled!\n", __func__, fiq_num);
+
+	return 0;
+}