diff --git a/arch/arm/include/samdl/irq.h b/arch/arm/include/samdl/irq.h
index 47b492877a..7047c19e2c 100644
--- a/arch/arm/include/samdl/irq.h
+++ b/arch/arm/include/samdl/irq.h
@@ -77,6 +77,8 @@
 
 #if defined(CONFIG_ARCH_FAMILY_SAMD20)
 #  include <arch/samdl/samd20_irq.h>
+#elif defined(CONFIG_ARCH_FAMILY_SAMD20)
+#  include <arch/samdl/samd21_irq.h>
 #elif defined(CONFIG_ARCH_FAMILY_SAML21)
 #  include <arch/samdl/saml21_irq.h>
 #else