diff --git a/CMakeLists.txt b/CMakeLists.txt
index 51e68ab1d..2efc1ee1d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -98,8 +98,11 @@ IF(UNIX)
 ENDIF(UNIX)
 
 # Make the headers visible to everything
+IF(NOT ${PROJECT_BINARY_DIR} EQUAL ${PROJECT_SOURCE_DIR})
+   INCLUDE_DIRECTORIES(${PROJECT_BINARY_DIR}/include)
+ENDIF(NOT ${PROJECT_BINARY_DIR} EQUAL ${PROJECT_SOURCE_DIR})
+
 INCLUDE_DIRECTORIES(
-    ${PROJECT_BINARY_DIR}/include
     ${OpenSceneGraph_SOURCE_DIR}/include
     ${OPENGL_INCLUDE_DIR}
 )