diff --git a/calendar/sunbird/app/Makefile.in b/calendar/sunbird/app/Makefile.in
--- a/calendar/sunbird/app/Makefile.in
+++ b/calendar/sunbird/app/Makefile.in
@@ -179,25 +179,27 @@ EXTRA_DEPS	+= \
 	$(STATIC_EXTRA_DEPS) \
 	$(NULL)
 DEFINES		+= $(STATIC_DEFINES)
 CPPSRCS		+= $(STATIC_CPPSRCS)
 EXTRA_DSO_LIBS	+= $(STATIC_EXTRA_DSO_LIBS)
 REQUIRES	+= $(STATIC_REQUIRES)
 EXTRA_LIBS	+= $(STATIC_EXTRA_LIBS)
 
+LIBS += $(MOZ_HARFBUZZ_LIBS)
+
 # OpenGL is required by (mozilla/)content/canvas: see (mozilla/)layout/build/Makefile.in.
 ifeq (cocoa,$(MOZ_WIDGET_TOOLKIT))
 OS_LIBS += -framework OpenGL
 endif
 
 endif # BUILD_STATIC_LIBS