diff --git a/intern/cycles/CMakeLists.txt b/intern/cycles/CMakeLists.txt
index 3b1c66ad712..16d5ffda889 100644
--- a/intern/cycles/CMakeLists.txt
+++ b/intern/cycles/CMakeLists.txt
@@ -63,6 +63,10 @@ if(WITH_CYCLES_NETWORK)
 	add_definitions(-DWITH_NETWORK)
 endif()
 
+if(WITH_CYCLES_STANDALONE_GUI)
+	add_definitions(-DWITH_CYCLES_STANDALONE_GUI)
+endif()
+
 if(WITH_CYCLES_PTEX)
 	add_definitions(-DWITH_PTEX)
 endif()