diff --git a/docker-entrypoint.sh b/docker-entrypoint.sh
index a2815e0..dec8df5 100644
--- a/docker-entrypoint.sh
+++ b/docker-entrypoint.sh
@@ -37,6 +37,15 @@ else
 	fi
 fi
 
+# DEBUG mode for unstable release
+if [ "$CNL_DOTCLEAR" == "unstable" ]; then
+	echo >&2 "Enabling Dotclear DEBUG mode"
+	sed -i -e "s/ \/\*== DC_DEBUG ==/ \/\/\*== DC_DEBUG ==/g" /var/www/dotclear/app/src/Config.php
+else
+	echo >&2 "Disabling Dotclear DEBUG mode"
+	sed -i -e "s/ \/\/\*== DC_DEBUG ==/ \/\*== DC_DEBUG ==/g" /var/www/dotclear/app/src/Config.php
+fi
+
 # Fix www permissions
 echo >&2 "Setting up permissions..."
 chown -R www:www /var/www/dotclear