diff --git a/AUTHORS b/AUTHORS
index c8b474a3ef..c82a04477e 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -314,3 +314,6 @@ We have received the following contributions:
 
  - q66
    2025-01: Added support for building with Boost 1.87.
+
+ - Darwin4053
+   2025-06: Fixed arguments order in flex option hook library debug messages.
diff --git a/ChangeLog b/ChangeLog
index 7ae037f543..10b98dad11 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2348.	[bug]		razvan, Darwin4053
+	Fix arguments order in flex option hook library debug messages.
+	(Gitlab #3875)
+
 Kea 2.7.9 (development) released on May 28, 2025
 
 2347.	[build]		andrei
diff --git a/src/hooks/dhcp/flex_option/flex_option.cc b/src/hooks/dhcp/flex_option/flex_option.cc
index 62193fa094..0ed9d44c1f 100644
--- a/src/hooks/dhcp/flex_option/flex_option.cc
+++ b/src/hooks/dhcp/flex_option/flex_option.cc
@@ -490,8 +490,8 @@ void
 FlexOptionImpl::logClass(const ClientClass& client_class, uint16_t code) {
     LOG_DEBUG(flex_option_logger, DBGLVL_TRACE_BASIC,
               FLEX_OPTION_PROCESS_CLIENT_CLASS)
-        .arg(client_class)
-        .arg(code);
+        .arg(code)
+        .arg(client_class);
     return;
 }
 
@@ -550,9 +550,9 @@ FlexOptionImpl::logSubClass(const ClientClass& client_class, uint16_t code,
                             uint16_t container_code) {
     LOG_DEBUG(flex_option_logger, DBGLVL_TRACE_BASIC,
               FLEX_OPTION_PROCESS_SUB_CLIENT_CLASS)
-        .arg(client_class)
         .arg(code)
-        .arg(container_code);
+        .arg(container_code)
+        .arg(client_class);
     return;
 }