diff --git a/system/config/system.yaml b/system/config/system.yaml
index 652524902..846ec740d 100644
--- a/system/config/system.yaml
+++ b/system/config/system.yaml
@@ -97,7 +97,7 @@ debugger:
 images:
   default_image_quality: 85                 # Default image quality to use when resampling images (85%)
   cache_all: false                          # Cache all image by default
-  cache_perms: 0755                         # Default cache folder perms. Usually 0755 or 0775 depending on setup
+  cache_perms: '0755'                       # MUST BE IN QUOTES!! Default cache folder perms. Usually '0755' or '0775'
   debug: false                              # Show an overlay over images indicating the pixel depth of the image when working with retina for example
 
 media: