diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 45986f3f527..2f87d4fd9d6 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -54,6 +54,7 @@ Thank you!
     Andrew Novikov <as.asaw@gmail.com>
     Andrew Tridgell
     Andrey <rybakovandrey85@gmail.com>
+    Andrey Kolesnik <akolesnik@astralinux.ru>
     Andrey Shorin <tolsty@tushino.com>
     Ankor <ankor2023@gmail.com>
     Anonymous <bigparrot@pirateperfection.com>
diff --git a/src/wccp2.cc b/src/wccp2.cc
index 4a95e7d0eaf..b8ef701bb31 100644
--- a/src/wccp2.cc
+++ b/src/wccp2.cc
@@ -1142,9 +1142,9 @@ static size_t
 CheckFieldDataLength(const FieldHeader *header, const size_t dataLength, const void *areaStart, const size_t areaSize, const char *error)
 {
     assert(header);
-    const auto dataStart = reinterpret_cast<const char*>(header) + sizeof(header);
+    const auto dataStart = reinterpret_cast<const char*>(header) + sizeof(*header);
     CheckSectionLength(dataStart, dataLength, areaStart, areaSize, error);
-    return sizeof(header) + dataLength; // no overflow after CheckSectionLength()
+    return sizeof(*header) + dataLength; // no overflow after CheckSectionLength()
 }
 
 /// Positions the given field at a given start within a given packet area.