3 files changed, 33 insertions, 3 deletions
diff --git a/Lessons/Lesson_20/README.md b/Lessons/Lesson_20/README.md
index e9ad949..8dab81d 100644
--- a/Lessons/Lesson_20/README.md
+++ b/Lessons/Lesson_20/README.md
@@ -631,6 +631,12 @@ typedef struct {
 #endif
 ```
 
+Add the `Include` folder to the DEC file:
+```
+[Includes]
+  Include
+```
+
 You can use the created `CustomStruct` structure type and initialize its values via this sytnax:
 ```
 gUefiLessonsPkgTokenSpaceGuid.PcdCustomStruct|{0}|CustomStruct|0x535D4CB5 {
diff --git a/Lessons/Lesson_20/UefiLessonsPkg/Include/CustomPcdTypes.h b/Lessons/Lesson_20/UefiLessonsPkg/Include/CustomPcdTypes.h
new file mode 100644
index 0000000..0b9eab0
--- /dev/null
+++ b/Lessons/Lesson_20/UefiLessonsPkg/Include/CustomPcdTypes.h
@@ -0,0 +1,23 @@
+#ifndef CUSTOM_PCD_TYPES_H
+#define CUSTOM_PCD_TYPES_H
+
+typedef struct {
+  EFI_GUID Guid;
+  CHAR16 Name[6];
+} InnerCustomStruct;
+
+typedef struct {
+  UINT8 Val8;
+  UINT32 Val32[2];
+  InnerCustomStruct ValStruct;
+  union {
+    struct {
+      UINT8 Field1:1;
+      UINT8 Field2:4;
+      UINT8 Filed3:3;
+    } BitFields;
+    UINT8 Byte;
+  } ValUnion;
+} CustomStruct;
+
+#endif
diff --git a/Lessons/Lesson_20/UefiLessonsPkg/UefiLessonsPkg.dec b/Lessons/Lesson_20/UefiLessonsPkg/UefiLessonsPkg.dec
index 2fb6e56..3ce3c6e 100644
--- a/Lessons/Lesson_20/UefiLessonsPkg/UefiLessonsPkg.dec
+++ b/Lessons/Lesson_20/UefiLessonsPkg/UefiLessonsPkg.dec
@@ -9,9 +9,10 @@
   PACKAGE_NAME                   = UefiLessonsPkg
   PACKAGE_GUID                   = 7e7edbba-ca2c-4177-a3f0-d3371358773a
   PACKAGE_VERSION                = 1.01
-
-[Includes]
-
+
+[Includes]
+  Include
+
 [LibraryClasses]
 
 [Guids]