diff --git a/config.in b/config.in
index 11c11ec59e..1d4ba23cdd 100644
--- a/config.in
+++ b/config.in
@@ -36,7 +36,7 @@ shadow_blur_radius 20
 shadow_color #0000007F
 
 # inactive window fade amount. 0.0 = no dimming, 1.0 = fully dimmed
-dim_inactive 0.0
+default dim_inactive 0.0
 dim_inactive_colors.unfocused #000000FF
 dim_inactive_colors.urgent #900000FF