1 files changed, 1 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index d49b400..f64b99c 100644
--- a/Makefile
+++ b/Makefile
@@ -64,7 +64,7 @@ cxrefbas: bas.o bcdfp.o
 bas.o: bas.c bas.h
 
 subdirs:
-	for dir in $(SUBDIRS); do make -C $$dir COPT=$(COPT); done
+	for dir in $(SUBDIRS); do make -C $$dir COPT="$(COPT)"; done
 
 a8eol: a8eol.c