diff --git a/src/daemon/default.pa.in b/src/daemon/default.pa.in
index a3ddad9ff..81dfe7103 100755
--- a/src/daemon/default.pa.in
+++ b/src/daemon/default.pa.in
@@ -171,5 +171,6 @@ load-module module-filter-apply
 
 ### Allow including a default.pa.d directory, which if present, can be used
 ### for additional configuration snippets.
+### Note that those snippet files must have a .pa file extension, not .conf
 .nofail
 .include @PA_DEFAULT_CONFIG_DIR_UNQUOTED@/default.pa.d
diff --git a/src/daemon/system.pa.in b/src/daemon/system.pa.in
index 989fcb4f3..795045bd4 100755
--- a/src/daemon/system.pa.in
+++ b/src/daemon/system.pa.in
@@ -69,5 +69,6 @@ load-module module-position-event-sounds
 
 ### Allow including a system.pa.d directory, which if present, can be used
 ### for additional configuration snippets.
+### Note that those snippet files must have a .pa file extension, not .conf
 .nofail
 .include @PA_DEFAULT_CONFIG_DIR_UNQUOTED@/system.pa.d