diff --git a/Projects/AVRISP/Doxygen.conf b/Projects/AVRISP/Doxygen.conf
index 47d88ed1cacccbcbe9472ca5cfce398d30a5a15d..eb8a1ab4c23879c3e54588ceb45dbff3d842bb2e 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 1f336b3b7a84a8a690e298713331136dede88c6e..6e81ac8e48d8326ef791a7c09024b9c92b7a92ea 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 f2b57343fa3fae4156096768873bc71a9b065389..cd2e2aa427b17111756e2507a1e0d4cbb5059f70 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 3e16407ce0b0ea85b2df6fa13494cdc80b1af341..93634a0224a9581fcc6f36da6f3c1d3ef05d3867 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 67261996844cad853c5e6dca69286151cb2c0e43..d1dfa15111657d11884824f98ff328e51866c23e 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
  *