diff --git a/pkgs/servers/atlassian/confluence.nix b/pkgs/servers/atlassian/confluence.nix
index b6af64e984e7..b7196709b422 100644
--- a/pkgs/servers/atlassian/confluence.nix
+++ b/pkgs/servers/atlassian/confluence.nix
@@ -6,13 +6,7 @@
 
 assert withMysql -> (mysql_jdbc != null);
 
-let
-  optionalWarning = cond: msg:
-    if cond then lib.warn msg
-    else lib.id;
-in
-
-optionalWarning (crowdProperties != null) "Using `crowdProperties` is deprecated!"
+lib.warnIf (crowdProperties != null) "Using `crowdProperties` is deprecated!"
 (stdenvNoCC.mkDerivation rec {
   pname = "atlassian-confluence";
   version = "7.19.14";
diff --git a/pkgs/servers/atlassian/crowd.nix b/pkgs/servers/atlassian/crowd.nix
index 4544ea56ff21..6c87e3c07115 100644
--- a/pkgs/servers/atlassian/crowd.nix
+++ b/pkgs/servers/atlassian/crowd.nix
@@ -1,13 +1,7 @@
 { lib, stdenv, fetchurl, home ? "/var/lib/crowd"
 , port ? 8092, proxyUrl ? null, openidPassword ? "WILL_NEVER_BE_SET" }:
 
-let
-  optionalWarning = cond: msg:
-    if cond then lib.warn msg
-    else lib.id;
-in
-
-optionalWarning (openidPassword != "WILL_NEVER_BE_SET") "Using `crowdProperties` is deprecated!"
+lib.warnIf (openidPassword != "WILL_NEVER_BE_SET") "Using `crowdProperties` is deprecated!"
 (stdenv.mkDerivation rec {
   pname = "atlassian-crowd";
   version = "5.0.1";