diff --git a/ChangeLog b/ChangeLog
index 30cd8ad..a649137 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,7 @@
 
 2003-07-10 Philippe C.D. Robert <probert@siggraph.org>
 
+        * Added missing includes: PCLib/PCDataSource.m, PCLib/PCButton.m
         * Added note in README about using ProjectCenter with Cocoa
         * Disabled unused menu entries: ProjectCenter_main.m
         * Some spelling corrections: PCMenuController.m
diff --git a/PCLib/PCButton.m b/PCLib/PCButton.m
index dcaa775..f3295c2 100644
--- a/PCLib/PCButton.m
+++ b/PCLib/PCButton.m
@@ -25,6 +25,7 @@
  */
 
 #include "PCButton.h"
+#include "PCDefines.h"
 
 @implementation PCButton
 
diff --git a/PCLib/PCDataSource.m b/PCLib/PCDataSource.m
index b0710f9..2129c3c 100644
--- a/PCLib/PCDataSource.m
+++ b/PCLib/PCDataSource.m
@@ -25,6 +25,7 @@
 */
 
 #include "PCDataSource.h"
+#include "PCDefines.h"
 
 @implementation PCDataSource