diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7151a1bde..3bb37e9a7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -348,6 +348,7 @@ endif()
 
 if(RETRODECK)
     add_compile_definitions(RETRODECK)
+    add_compile_definitions(__RETRODECK__)
     message("-- Building for RetroDECK")
 endif()