diff --git a/bsps/include/bsp/irq-generic.h b/bsps/include/bsp/irq-generic.h
index eeea2e3df2..279a0d3575 100644
--- a/bsps/include/bsp/irq-generic.h
+++ b/bsps/include/bsp/irq-generic.h
@@ -68,7 +68,12 @@ extern "C" {
 #endif
 
 #ifndef BSP_INTERRUPT_DISPATCH_TABLE_SIZE
-  #define BSP_INTERRUPT_DISPATCH_TABLE_SIZE BSP_INTERRUPT_VECTOR_COUNT
+  #if BSP_INTERRUPT_VECTOR_COUNT == 0
+    /* Avoid array subscript index is outside array bounds warnings */
+    #define BSP_INTERRUPT_DISPATCH_TABLE_SIZE 1
+  #else
+    #define BSP_INTERRUPT_DISPATCH_TABLE_SIZE BSP_INTERRUPT_VECTOR_COUNT
+  #endif
 #endif
 
 #if !defined(BSP_IRQ_HAVE_GET_SET_AFFINITY) && defined(RTEMS_SMP)