diff --git a/src/main/resources/configuration.txt b/src/main/resources/configuration.txt
index 2a7b5432..86010207 100644
--- a/src/main/resources/configuration.txt
+++ b/src/main/resources/configuration.txt
@@ -190,6 +190,10 @@ enabletilehash: true
 # Optional - enable smooth lighting by default on all maps supporting it (can be set per map as lighting option)
 smooth-lighting: false
 
+# Default image format for HDMaps (png, jpg, jpg-q75, jpg-q80, jpg-q85, jpg-q90, jpg-q95, jpg-q100)
+# Has no effect on maps with explicit format settings
+image-format: png
+
 # Pre 0.29 render options - set all three to false if you want same results as 0.28 (i.e. you have existing maps and don't want to render)
 #  use-generated-textures: if true, use generated textures (same as client); false is static, pre 0.29 textures
 #  correct-water-lighting: if true, use corrected water lighting (same as client); false is legacy, pre 0.29 water (darker)