diff --git a/jpeg/Makefile b/jpeg/Makefile
index 77ee7f4264d4..7a871af09d20 100644
--- a/jpeg/Makefile
+++ b/jpeg/Makefile
@@ -90,7 +90,9 @@ include $(DEPTH)/config/rules.mk
 # egcs-2.90.23 980102 (egcs-1.0.1 release)
 #
 ifeq ($(OS_ARCH)$(CPU_ARCH),Linuxalpha)
+ifdef BUILD_OPT
 $(OBJDIR)/jidctred.o: jidctred.c
 	@$(MAKE_OBJDIR)
 	$(CC) -o $@ -c $(XP_DEFINE) -O $(OS_CFLAGS) $(MDUPDATE_FLAGS) $(DEFINES) $(INCLUDES) $(XCFLAGS) $(PROF_FLAGS) $<
 endif
+endif