diff --git a/reactos/drivers/bus/acpi/ospm/osl.c b/reactos/drivers/bus/acpi/ospm/osl.c
index fed55a17d54..741f0714c91 100644
--- a/reactos/drivers/bus/acpi/ospm/osl.c
+++ b/reactos/drivers/bus/acpi/ospm/osl.c
@@ -219,6 +219,11 @@ acpi_os_install_interrupt_handler(u32 irq, OSD_HANDLER handler, void *context)
     &DIrql,
     &Affinity);
 
+  AcpiIrqNumber = irq;
+  AcpiIrqHandler = handler;
+  AcpiIrqContext = context;
+  AcpiInterruptHandlerRegistered = TRUE;
+
   Status = IoConnectInterrupt(
     &AcpiInterrupt,
     OslIsrStub,
@@ -236,11 +241,6 @@ acpi_os_install_interrupt_handler(u32 irq, OSD_HANDLER handler, void *context)
     return AE_ERROR;
   }
 
-  AcpiIrqNumber = irq;
-  AcpiIrqHandler = handler;
-  AcpiIrqContext = context;
-  AcpiInterruptHandlerRegistered = TRUE;
-
 	return AE_OK;
 }