diff --git a/Projects/AVRISP/Doxygen.conf b/Projects/AVRISP/Doxygen.conf
index 47d88ed1ca..eb8a1ab4c2 100644
--- a/Projects/AVRISP/Doxygen.conf
+++ b/Projects/AVRISP/Doxygen.conf
@@ -1221,7 +1221,7 @@ INCLUDE_FILE_PATTERNS  =
 # undefined via #undef or recursively expanded use the := operator 
 # instead of the = operator.
 
-PREDEFINED             = __DOXYGEN__ ENABLE_ISP_PROTOCOL ENABLE_PDI_PROTOCOL
+PREDEFINED             = __DOXYGEN__
 
 # If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then 
 # this tag can be used to specify a list of macro names that should be expanded. 
diff --git a/Projects/AVRISP/Lib/ISPProtocol.c b/Projects/AVRISP/Lib/ISPProtocol.c
index 1f336b3b7a..6e81ac8e48 100644
--- a/Projects/AVRISP/Lib/ISPProtocol.c
+++ b/Projects/AVRISP/Lib/ISPProtocol.c
@@ -28,7 +28,7 @@
   this software.
 */
 
-#if defined(ENABLE_ISP_PROTOCOL)
+#if defined(ENABLE_ISP_PROTOCOL) || defined(__DOXYGEN__)
 
 /** \file
  *
diff --git a/Projects/AVRISP/Lib/ISPTarget.c b/Projects/AVRISP/Lib/ISPTarget.c
index f2b57343fa..cd2e2aa427 100644
--- a/Projects/AVRISP/Lib/ISPTarget.c
+++ b/Projects/AVRISP/Lib/ISPTarget.c
@@ -28,7 +28,7 @@
   this software.
 */
 
-#if defined(ENABLE_ISP_PROTOCOL)
+#if defined(ENABLE_ISP_PROTOCOL) || defined(__DOXYGEN__)
 
 /** \file
  *
diff --git a/Projects/AVRISP/Lib/PDIProtocol.c b/Projects/AVRISP/Lib/PDIProtocol.c
index 3e16407ce0..93634a0224 100644
--- a/Projects/AVRISP/Lib/PDIProtocol.c
+++ b/Projects/AVRISP/Lib/PDIProtocol.c
@@ -28,7 +28,7 @@
   this software.
 */
 
-#if defined(ENABLE_PDI_PROTOCOL)
+#if defined(ENABLE_PDI_PROTOCOL) || defined(__DOXYGEN__)
 
 #warning PDI Programming Protocol support is incomplete and not currently suitable for use.
 
diff --git a/Projects/AVRISP/Lib/PDITarget.c b/Projects/AVRISP/Lib/PDITarget.c
index 6726199684..d1dfa15111 100644
--- a/Projects/AVRISP/Lib/PDITarget.c
+++ b/Projects/AVRISP/Lib/PDITarget.c
@@ -28,7 +28,7 @@
   this software.
 */
 
-#if defined(ENABLE_PDI_PROTOCOL)
+#if defined(ENABLE_PDI_PROTOCOL) || defined(__DOXYGEN__)
 
 /** \file
  *