diff --git a/ntoskrnl/io/iomgr/driver.c b/ntoskrnl/io/iomgr/driver.c
index 38589441ad4..8107c4906ed 100644
--- a/ntoskrnl/io/iomgr/driver.c
+++ b/ntoskrnl/io/iomgr/driver.c
@@ -1731,7 +1731,8 @@ try_again:
  */
 VOID
 NTAPI
-IoDeleteDriver(IN PDRIVER_OBJECT DriverObject)
+IoDeleteDriver(
+    _In_ PDRIVER_OBJECT DriverObject)
 {
     /* Simply dereference the Object */
     ObDereferenceObject(DriverObject);
diff --git a/sdk/include/ndk/iofuncs.h b/sdk/include/ndk/iofuncs.h
index a141883381f..8bac30e3019 100644
--- a/sdk/include/ndk/iofuncs.h
+++ b/sdk/include/ndk/iofuncs.h
@@ -56,6 +56,12 @@ IoCreateDriver(
     _In_ PDRIVER_INITIALIZE InitializationFunction
 );
 
+VOID
+NTAPI
+IoDeleteDriver(
+    _In_ PDRIVER_OBJECT DriverObject
+);
+
 NTSTATUS
 NTAPI
 IoReportHalResourceUsage(