diff --git a/platform/emscripten/gmake/rtt.make b/platform/emscripten/gmake/rtt.make
index b5fdba8e3..0d7b7244b 100644
--- a/platform/emscripten/gmake/rtt.make
+++ b/platform/emscripten/gmake/rtt.make
@@ -171,6 +171,7 @@ OBJECTS := \
 	$(OBJDIR)/CoronaEvent.o \
 	$(OBJDIR)/CoronaLibrary.o \
 	$(OBJDIR)/CoronaLua.o \
+	$(OBJDIR)/CoronaMemory.o \
 	$(OBJDIR)/Rtt_BitmapMask.o \
 	$(OBJDIR)/Rtt_BitmapPaint.o \
 	$(OBJDIR)/Rtt_BitmapPaintAdapter.o \
@@ -867,6 +868,10 @@ $(OBJDIR)/CoronaLua.o: ../../../librtt/Corona/CoronaLua.cpp
 	@echo $(notdir $<)
 	$(SILENT) $(CXX) $(ALL_CXXFLAGS) $(FORCE_INCLUDE) -o "$@" -MF $(@:%.o=%.d) -c "$<"
 
+$(OBJDIR)/CoronaMemory.o: ../../../librtt/Corona/CoronaMemory.cpp
+	@echo $(notdir $<)
+	$(SILENT) $(CXX) $(ALL_CXXFLAGS) $(FORCE_INCLUDE) -o "$@" -MF $(@:%.o=%.d) -c "$<"
+
 $(OBJDIR)/Rtt_BitmapMask.o: ../../../librtt/Display/Rtt_BitmapMask.cpp
 	@echo $(notdir $<)
 	$(SILENT) $(CXX) $(ALL_CXXFLAGS) $(FORCE_INCLUDE) -o "$@" -MF $(@:%.o=%.d) -c "$<"