diff --git a/debian/etc/taler/exchange-business.conf b/debian/etc/taler/exchange-business.conf
index 8b97c6089..669ed4546 100644
--- a/debian/etc/taler/exchange-business.conf
+++ b/debian/etc/taler/exchange-business.conf
@@ -1,4 +1,4 @@
-TALER_RUNTIME_DIR = /var/lib/taler-exchange/tmp/
+# Configuration for business-level aspects of the exchange.
 
 [taler]
 # Here you need to set the currency of your exchange:
diff --git a/debian/etc/taler/exchange-service-default.conf b/debian/etc/taler/exchange-service-default.conf
index 3ac3e4bee..4e3981004 100644
--- a/debian/etc/taler/exchange-service-default.conf
+++ b/debian/etc/taler/exchange-service-default.conf
@@ -1,3 +1,10 @@
+# This configuration file is the entry point for most
+# Taler exchange services.
+#
+# It includes other configuration files,
+# which are applied on top of the read-only base configuration
+# (typically in /usr/share/taler/config.d/).
+
 @INLINE@ exchange-system.conf
 @INLINE@ exchange-db.conf
 @INLINE@ exchange-business.conf
diff --git a/debian/etc/taler/exchange-service-wire.conf b/debian/etc/taler/exchange-service-wire.conf
index 0f1ccd463..ed25e381c 100644
--- a/debian/etc/taler/exchange-service-wire.conf
+++ b/debian/etc/taler/exchange-service-wire.conf
@@ -1,3 +1,11 @@
+# This configuration file is the entry point for
+# Taler exchange services that access the wire gateway,
+# i.e. the protocol bridge to core banking functionality.
+#
+# It includes other configuration files,
+# which are applied on top of the read-only base configuration
+# (typically in /usr/share/taler/config.d/).
+
 @INLINE@ exchange-system.conf
 @INLINE@ exchange-db.conf
 @INLINE@ exchange-business.conf