diff --git a/libxx/libxx_delete_sized.cxx b/libxx/libxx_delete_sized.cxx
index ff461d9486c..874836c4916 100644
--- a/libxx/libxx_delete_sized.cxx
+++ b/libxx/libxx_delete_sized.cxx
@@ -61,9 +61,9 @@
 
 //void operator delete(FAR void *ptr, std::size_t size)
 #ifdef CONFIG_CXX_NEWLONG
-void *operator delete(FAR void *ptr, unsigned long nbytes)
+void operator delete(FAR void *ptr, unsigned long nbytes)
 #else
-void *operator delete(FAR void *ptr, unsigned int nbytes)
+void operator delete(FAR void *ptr, unsigned int nbytes)
 #endif
 {
   lib_free(ptr);