diff --git a/mk/patterns.mk b/mk/patterns.mk
index 87d90955bf..77e1721361 100644
--- a/mk/patterns.mk
+++ b/mk/patterns.mk
@@ -1,5 +1,8 @@
 %.o: %.cc
 	$(QUIET) $(CXX) -o $@ -c $< $(GLOBAL_CXXFLAGS) $(CXXFLAGS) $($@_CXXFLAGS) -MMD -MF $(basename $@).dep -MP
 
+%.o: %.cpp
+	$(QUIET) $(CXX) -o $@ -c $< $(GLOBAL_CXXFLAGS) $(CXXFLAGS) $($@_CXXFLAGS) -MMD -MF $(basename $@).dep -MP
+
 %.o: %.c
 	$(QUIET) $(CC) -o $@ -c $< $(GLOBAL_CFLAGS) $(CFLAGS) $($@_CFLAGS) -MMD -MF $(basename $@).dep -MP