diff --git a/include/kvm/interrupt.h b/include/kvm/interrupt.h
index f6c1949..d60ccdb 100644
--- a/include/kvm/interrupt.h
+++ b/include/kvm/interrupt.h
@@ -26,5 +26,6 @@ struct interrupt_table {
 
 void interrupt_table__copy(struct interrupt_table *self, void *dst, unsigned int size);
 void interrupt_table__setup(struct interrupt_table *self, struct real_intr_desc *entry);
+void interrupt_table__set(struct interrupt_table *self, struct real_intr_desc *entry, unsigned int num);
 
 #endif /* KVM__INTERRUPT_H */
diff --git a/interrupt.c b/interrupt.c
index 77319cd..fbf4ecd 100644
--- a/interrupt.c
+++ b/interrupt.c
@@ -19,3 +19,9 @@ void interrupt_table__setup(struct interrupt_table *self, struct real_intr_desc
 	for (i = 0; i < REAL_INTR_VECTORS; i++)
 		self->entries[i] = *entry;
 }
+
+void interrupt_table__set(struct interrupt_table *self, struct real_intr_desc *entry, unsigned int num)
+{
+	if (num < REAL_INTR_VECTORS)
+		self->entries[num] = *entry;
+}