diff --git a/CHANGES.current b/CHANGES.current
index 077c5d955..784df509f 100644
--- a/CHANGES.current
+++ b/CHANGES.current
@@ -7,6 +7,10 @@ the issue number to the end of the URL: https://github.com/swig/swig/issues/
 Version 4.3.0 (in progress)
 ===========================
 
+2024-09-19: wsfulton
+            #2879 Don't show warning SWIGWARN_LANG_SMARTPTR_MISSING (520) if
+            class is ignored.
+
 2024-09-21: olly
 	    SWIG was ignoring `final` if specified after `noexcept`.
 
diff --git a/Examples/test-suite/errors/cpp_smartptr_feature.i b/Examples/test-suite/errors/cpp_smartptr_feature.i
index 4a0d510cd..11cf62feb 100644
--- a/Examples/test-suite/errors/cpp_smartptr_feature.i
+++ b/Examples/test-suite/errors/cpp_smartptr_feature.i
@@ -9,6 +9,17 @@ struct BB : AA {};
 struct CC : AA {};
 struct DD : AA {};
 
+%ignore EE;
+struct EE : AA {}; // should not warn for AA base as EE is ignored
+struct EEE : EE {}; // should warn for AA base, but not for EE base
+
 %feature("smartptr", noblock=1) YY { std::shared_ptr< YY > }
 struct XX {};
 struct YY : XX {};
+
+%feature("smartptr", noblock=1) ZZ { std::shared_ptr< YY > }
+%ignore ZZ;
+struct ZZ : XX {};
+// Next two are NOT smartptr and so should not issue warning
+struct ZZZ : ZZ {};
+struct ZZZZ : ZZZ {};
diff --git a/Examples/test-suite/errors/cpp_smartptr_feature.stderr b/Examples/test-suite/errors/cpp_smartptr_feature.stderr
index 442f795ac..4a6a5ee28 100644
--- a/Examples/test-suite/errors/cpp_smartptr_feature.stderr
+++ b/Examples/test-suite/errors/cpp_smartptr_feature.stderr
@@ -2,4 +2,5 @@ cpp_smartptr_feature.i:8: Warning 520: Derived class 'BB' of 'AA' is not similar
 cpp_smartptr_feature.i:9: Warning 520: Derived class 'CC' of 'AA' is not similarly marked as a smart pointer.
 cpp_smartptr_feature.i:10: Error: Invalid type (std::shared_ptr<) in 'smartptr' feature for class DD.
 cpp_smartptr_feature.i:10: Warning 520: Derived class 'DD' of 'AA' is not similarly marked as a smart pointer.
-cpp_smartptr_feature.i:14: Warning 520: Base class 'XX' of 'YY' is not similarly marked as a smart pointer.
+cpp_smartptr_feature.i:14: Warning 520: Derived class 'EEE' of 'AA' is not similarly marked as a smart pointer.
+cpp_smartptr_feature.i:18: Warning 520: Base class 'XX' of 'YY' is not similarly marked as a smart pointer.
diff --git a/Source/Modules/typepass.cxx b/Source/Modules/typepass.cxx
index 716204c7f..a75be41b3 100644
--- a/Source/Modules/typepass.cxx
+++ b/Source/Modules/typepass.cxx
@@ -282,7 +282,8 @@ class TypePass:private Dispatcher {
 	  }
 	} else {
 	  if (GetFlag(bclass, "smart"))
-	    Swig_warning(WARN_LANG_SMARTPTR_MISSING, Getfile(first), Getline(first), "Derived class '%s' of '%s' is not similarly marked as a smart pointer.\n", SwigType_namestr(Getattr(first, "name")), SwigType_namestr(Getattr(bclass, "name")));
+	    if (!GetFlag(first, "feature:ignore"))
+	      Swig_warning(WARN_LANG_SMARTPTR_MISSING, Getfile(first), Getline(first), "Derived class '%s' of '%s' is not similarly marked as a smart pointer.\n", SwigType_namestr(Getattr(first, "name")), SwigType_namestr(Getattr(bclass, "name")));
 	}
       }
       if (!importmode) {