diff --git a/contrib/src/speedtree/config_speedtree.h b/contrib/src/speedtree/config_speedtree.h
index ab4c6bedaf..d4be33c366 100644
--- a/contrib/src/speedtree/config_speedtree.h
+++ b/contrib/src/speedtree/config_speedtree.h
@@ -14,7 +14,7 @@
 #ifndef CONFIG_SPEEDTREE_H
 #define CONFIG_SPEEDTREE_H
 
-#include "pandabase.h"
+#include "contribbase.h"
 #include "notifyCategoryProxy.h"
 #include "configVariableBool.h"
 #include "configVariableDouble.h"
diff --git a/contrib/src/speedtree/loaderFileTypeSrt.h b/contrib/src/speedtree/loaderFileTypeSrt.h
index ba40a0e5a1..b20d920637 100644
--- a/contrib/src/speedtree/loaderFileTypeSrt.h
+++ b/contrib/src/speedtree/loaderFileTypeSrt.h
@@ -14,7 +14,7 @@
 #ifndef LOADERFILETYPESRT_H
 #define LOADERFILETYPESRT_H
 
-#include "pandabase.h"
+#include "contribbase.h"
 
 #include "loaderFileType.h"
 
diff --git a/contrib/src/speedtree/loaderFileTypeStf.h b/contrib/src/speedtree/loaderFileTypeStf.h
index 04bc8207e1..0a89dbf0bc 100644
--- a/contrib/src/speedtree/loaderFileTypeStf.h
+++ b/contrib/src/speedtree/loaderFileTypeStf.h
@@ -14,7 +14,7 @@
 #ifndef LOADERFILETYPESTF_H
 #define LOADERFILETYPESTF_H
 
-#include "pandabase.h"
+#include "contribbase.h"
 
 #include "loaderFileType.h"
 
diff --git a/contrib/src/speedtree/speedTreeNode.cxx b/contrib/src/speedtree/speedTreeNode.cxx
index eed5399fc4..198160b584 100644
--- a/contrib/src/speedtree/speedTreeNode.cxx
+++ b/contrib/src/speedtree/speedTreeNode.cxx
@@ -11,7 +11,7 @@
  * @date 2009-03-13
  */
 
-#include "pandabase.h"
+#include "contribbase.h"
 #include "speedTreeNode.h"
 #include "stBasicTerrain.h"
 #include "virtualFileSystem.h"
diff --git a/contrib/src/speedtree/speedTreeNode.h b/contrib/src/speedtree/speedTreeNode.h
index b45a3df6ee..3c95bbce76 100644
--- a/contrib/src/speedtree/speedTreeNode.h
+++ b/contrib/src/speedtree/speedTreeNode.h
@@ -14,7 +14,7 @@
 #ifndef SPEEDTREENODE_H
 #define SPEEDTREENODE_H
 
-#include "pandabase.h"
+#include "contribbase.h"
 #include "pandaNode.h"
 #include "pointerTo.h"
 #include "stTree.h"
diff --git a/contrib/src/speedtree/stBasicTerrain.h b/contrib/src/speedtree/stBasicTerrain.h
index 048c507ac7..cba3fadf21 100644
--- a/contrib/src/speedtree/stBasicTerrain.h
+++ b/contrib/src/speedtree/stBasicTerrain.h
@@ -14,7 +14,7 @@
 #ifndef STBASICTERRAIN_H
 #define STBASICTERRAIN_H
 
-#include "pandabase.h"
+#include "contribbase.h"
 #include "stTerrain.h"
 #include "luse.h"
 #include "pvector.h"
diff --git a/contrib/src/speedtree/stTerrain.h b/contrib/src/speedtree/stTerrain.h
index d9a2c3160a..76309d97b6 100644
--- a/contrib/src/speedtree/stTerrain.h
+++ b/contrib/src/speedtree/stTerrain.h
@@ -14,7 +14,7 @@
 #ifndef STTERRAIN_H
 #define STTERRAIN_H
 
-#include "pandabase.h"
+#include "contribbase.h"
 #include "typedReferenceCount.h"
 #include "namable.h"
 #include "geomVertexData.h"
diff --git a/contrib/src/speedtree/stTransform.h b/contrib/src/speedtree/stTransform.h
index d3329b7be1..e6fe1edaa2 100644
--- a/contrib/src/speedtree/stTransform.h
+++ b/contrib/src/speedtree/stTransform.h
@@ -14,7 +14,7 @@
 #ifndef STTRANSFORM_H
 #define STTRANSFORM_H
 
-#include "pandabase.h"
+#include "contribbase.h"
 #include "transformState.h"
 #include "speedtree_api.h"
 #include "deg_2_rad.h"
diff --git a/contrib/src/speedtree/stTree.h b/contrib/src/speedtree/stTree.h
index e150f70ceb..53ac67be8d 100644
--- a/contrib/src/speedtree/stTree.h
+++ b/contrib/src/speedtree/stTree.h
@@ -14,7 +14,7 @@
 #ifndef STTREE_H
 #define STTREE_H
 
-#include "pandabase.h"
+#include "contribbase.h"
 #include "typedReferenceCount.h"
 #include "namable.h"
 #include "speedtree_api.h"