diff --git a/configure.ac b/configure.ac
index 355cf0b4..d09fec9d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -659,7 +659,5 @@ CFLAGS="$SAVED_CFLAGS"
 AC_SUBST(AM_LDFLAGS)
 LDFLAGS="$SAVED_LDFLAGS"
 
-AC_PROG_YACC
-
 # autoconf should create a Makefile.
 AC_OUTPUT(Makefile)