diff --git a/platforms/desktop-shared/Makefile.common b/platforms/desktop-shared/Makefile.common
index 9fc973d2..8b3339bf 100644
--- a/platforms/desktop-shared/Makefile.common
+++ b/platforms/desktop-shared/Makefile.common
@@ -62,6 +62,9 @@ all: $(TARGET)
 $(TARGET): $(OBJECTS)
 	$(CXX) -o $@ $(OBJECTS) $(LDFLAGS)
 
+%.o: %.mm
+	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c -o $@ $<
+
 %.o: %.cpp
 	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c -o $@ $<
 
diff --git a/platforms/desktop-shared/nfd/nfd_cocoa.cpp b/platforms/desktop-shared/nfd/nfd_cocoa.mm
similarity index 100%
rename from platforms/desktop-shared/nfd/nfd_cocoa.cpp
rename to platforms/desktop-shared/nfd/nfd_cocoa.mm