diff --git a/utils/TerraSync/CMakeLists.txt b/utils/TerraSync/CMakeLists.txt
index 783cdffca..dcea912b2 100644
--- a/utils/TerraSync/CMakeLists.txt
+++ b/utils/TerraSync/CMakeLists.txt
@@ -9,7 +9,7 @@ target_link_libraries(terrasync
 
 if(LIBSVN_FOUND)
 	target_link_libraries(terrasync ${LIBSVN_LIBRARIES})
-	set_property(TARGET terrasync APPEND PROPERTY COMPILE_FLAGS "${APR_CFLAGS}")
+	set_property(TARGET terrasync APPEND PROPERTY COMPILE_FLAGS "${APR_CFLAGS} -DNO_OPENSCENEGRAPH_INTERFACE")
 endif()