diff --git a/zonebg/CMakeLists.txt b/zonebg/CMakeLists.txt
index e2904502..b250a44b 100644
--- a/zonebg/CMakeLists.txt
+++ b/zonebg/CMakeLists.txt
@@ -2,7 +2,7 @@
 #
 # Installs default "zone background" files
 
-FILE(GLOB zonebg "${CMAKE_CURRENT_SOURCE_DIR}/*.*")
+FILE(GLOB zonebg "${CMAKE_CURRENT_SOURCE_DIR}/*.png" "${CMAKE_CURRENT_SOURCE_DIR}/*.jpg")
 
 if(UNIX)
     if(APPLE)