diff --git a/reactos/sdk/include/ndk/ketypes.h b/reactos/sdk/include/ndk/ketypes.h
index 11e48bfc115..07e9feb946d 100644
--- a/reactos/sdk/include/ndk/ketypes.h
+++ b/reactos/sdk/include/ndk/ketypes.h
@@ -4,11 +4,11 @@ Copyright (c) Alex Ionescu.  All rights reserved.
 
 Header Name:
 
-    lpctypes.h
+    ketypes.h
 
 Abstract:
 
-    Type definitions for the Loader.
+    Type definitions for the Kernel services.
 
 Author:
 
diff --git a/reactos/sdk/include/ndk/lpcfuncs.h b/reactos/sdk/include/ndk/lpcfuncs.h
index ffa096288e6..e140f6d02b9 100644
--- a/reactos/sdk/include/ndk/lpcfuncs.h
+++ b/reactos/sdk/include/ndk/lpcfuncs.h
@@ -8,7 +8,7 @@ Header Name:
 
 Abstract:
 
-    Function definitions for the Executive.
+    Function definitions for the Local Procedure Call.
 
 Author:
 
@@ -23,6 +23,7 @@ Author:
 // Dependencies
 //
 #include <umtypes.h>
+#include <lpctypes.h>
 
 //
 // LPC Exports
diff --git a/reactos/sdk/include/ndk/lpctypes.h b/reactos/sdk/include/ndk/lpctypes.h
index 24984da5d5e..23d2f48005f 100644
--- a/reactos/sdk/include/ndk/lpctypes.h
+++ b/reactos/sdk/include/ndk/lpctypes.h
@@ -8,7 +8,7 @@ Header Name:
 
 Abstract:
 
-    Type definitions for the Loader.
+    Type definitions for the Local Procedure Call.
 
 Author:
 
diff --git a/reactos/sdk/include/ndk/obfuncs.h b/reactos/sdk/include/ndk/obfuncs.h
index 1bca142d08b..7c3218f1486 100644
--- a/reactos/sdk/include/ndk/obfuncs.h
+++ b/reactos/sdk/include/ndk/obfuncs.h
@@ -4,11 +4,11 @@ Copyright (c) Alex Ionescu.  All rights reserved.
 
 Header Name:
 
-    obtypes.h
+    obfuncs.h
 
 Abstract:
 
-    Type definitions for the Object Manager
+    Function definitions for the Object Manager
 
 Author: