diff --git a/Makefile.oirg b/Makefile
index 24049d3..5d5d58d 100644
--- a/Makefile.oirg
+++ b/Makefile
@@ -5,6 +5,7 @@
 default: build/debug/mujs build/debug/mujs-pp
 
 CFLAGS = -std=c99 -pedantic -Wall -Wextra -Wno-unused-parameter
+CFLAGS += $(XCFLAGS) $(XLDFLAGS)
 
 OPTIM = -O3