--- a/calendar/sunbird/app/Makefile.in
+++ b/calendar/sunbird/app/Makefile.in
@@ -161,20 +161,16 @@ include $(topsrcdir)/config/config.mk
 ifdef _MSC_VER
 # Always enter a Windows program through wmain, whether or not we're
 # a console application.
 WIN32_EXE_LDFLAGS += -ENTRY:wmainCRTStartup
 endif
 
 ifndef BUILD_STATIC_LIBS
 
-ifdef NS_TRACE_MALLOC
-EXTRA_DSO_LIBS += tracemalloc
-endif
-
 else
 include $(topsrcdir)/config/static-config.mk
 
 EXTRA_DEPS	+= \
 	$(STATIC_EXTRA_DEPS) \
 	$(NULL)
 DEFINES		+= $(STATIC_DEFINES)
 CPPSRCS		+= $(STATIC_CPPSRCS)