diff --git a/panda/src/particlesystem/colorInterpolationManager.cxx b/panda/src/particlesystem/colorInterpolationManager.cxx
index 90f30de6b2..27268c2ef8 100644
--- a/panda/src/particlesystem/colorInterpolationManager.cxx
+++ b/panda/src/particlesystem/colorInterpolationManager.cxx
@@ -11,6 +11,7 @@
  * @date 2005-06-02
  */
 
+#include "colorInterpolationManager.h"
 #include "mathNumbers.h"
 
 TypeHandle ColorInterpolationFunction::_type_handle;
diff --git a/panda/src/pnmtext/pnmTextMaker.cxx b/panda/src/pnmtext/pnmTextMaker.cxx
index af6f400341..1c11dac21c 100644
--- a/panda/src/pnmtext/pnmTextMaker.cxx
+++ b/panda/src/pnmtext/pnmTextMaker.cxx
@@ -16,6 +16,8 @@
 #include "filename.h"
 #include "pnmImage.h"
 
+#include FT_OUTLINE_H
+
 /**
  * The constructor expects the name of some font file that FreeType can read,
  * along with face_index, indicating which font within the file to load
diff --git a/panda/src/text/dynamicTextFont.cxx b/panda/src/text/dynamicTextFont.cxx
index 6143db7f61..705bd1a943 100644
--- a/panda/src/text/dynamicTextFont.cxx
+++ b/panda/src/text/dynamicTextFont.cxx
@@ -42,6 +42,7 @@
 // #include "renderModeAttrib.h" #include "antialiasAttrib.h"
 #include "colorAttrib.h"
 #include "textureAttrib.h"
+#include "transparencyAttrib.h"
 
 TypeHandle DynamicTextFont::_type_handle;