diff --git a/gcc/cobol/Make-lang.in b/gcc/cobol/Make-lang.in
index 26dec534c3a4bde83f5b6bf9b60480ae50ccf188..f585bb375bbc33fb0980d61dc0ea0c38e76bc7da 100644
--- a/gcc/cobol/Make-lang.in
+++ b/gcc/cobol/Make-lang.in
@@ -64,11 +64,9 @@ CPPFLAGS =					\
  -DEXEC_LIB=\"$(PREFIX)/$(libdir)\"		\
  $(END)
 
-BISON = bison
 YFLAGS = -Werror -Wmidrule-values -Wno-yacc \
 	--debug --verbose
 
-FLEX = flex
 LFLAGS = -d -Ca
 
 #