diff --git a/src/osgPlugins/txp/CMakeLists.txt b/src/osgPlugins/txp/CMakeLists.txt
index 97774ca8e..0685e8c6f 100644
--- a/src/osgPlugins/txp/CMakeLists.txt
+++ b/src/osgPlugins/txp/CMakeLists.txt
@@ -60,7 +60,7 @@ SET(TARGET_H
     TXPSeamLOD.h
 )
 
-INCLUDE_DIRECTORIES(.)
+INCLUDE_DIRECTORIES(${OpenSceneGraph_SOURCE_DIR}/src/osgPlugins/txp)
 
 SET(TARGET_ADDED_LIBRARIES osgSim osgText)