diff --git a/src/external_common.cmake b/src/external_common.cmake
index b644e8ee2..70ffc22de 100644
--- a/src/external_common.cmake
+++ b/src/external_common.cmake
@@ -5,7 +5,7 @@ add_subdirectory(${GLEW_DIR})
 
 # VCGLIb -- required
 if(NOT VCGDIR)
-	get_filename_component(VCGDIR "${CMAKE_CURRENT_SOURCE_DIR}/vcglib" ABSOLUTE)
+	get_filename_component(VCGDIR "${CMAKE_CURRENT_LIST_DIR}/vcglib" ABSOLUTE)
 	if(NOT EXISTS ${VCGDIR})
 		set(VCGDIR NOTFOUND)
 	endif()