diff --git a/bsps/arm/atsam/include/bsp/irq.h b/bsps/arm/atsam/include/bsp/irq.h
index fa3d56ab1e..e788570469 100644
--- a/bsps/arm/atsam/include/bsp/irq.h
+++ b/bsps/arm/atsam/include/bsp/irq.h
@@ -23,6 +23,6 @@
   #include <rtems/irq-extension.h>
 #endif
 
-#define BSP_INTERRUPT_VECTOR_COUNT 65
+#define BSP_INTERRUPT_VECTOR_COUNT 64
 
 #endif /* LIBBSP_ARM_ATSAM_ESV_70_IRQ_H */