diff --git a/core/templates/cowdata.h b/core/templates/cowdata.h
index ba9babe0af..9b8c0eb528 100644
--- a/core/templates/cowdata.h
+++ b/core/templates/cowdata.h
@@ -49,6 +49,12 @@ class VMap;
 SAFE_NUMERIC_TYPE_PUN_GUARANTEES(uint32_t)
 #endif
 
+// Silence a false positive warning (see GH-52119).
+#if defined(__GNUC__) && !defined(__clang__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wplacement-new"
+#endif
+
 template <class T>
 class CowData {
 	template <class TV>
@@ -380,4 +386,8 @@ CowData<T>::~CowData() {
 	_unref(_ptr);
 }
 
+#if defined(__GNUC__) && !defined(__clang__)
+#pragma GCC diagnostic pop
+#endif
+
 #endif // COWDATA_H