diff --git a/lib/Makefile.am b/lib/Makefile.am
index 0de12dbc..f7a012d3 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -15,8 +15,6 @@
 ## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 ## 02111-1307  USA
 
-AUTOMAKE_OPTIONS = ansi2knr
-
 AM_CFLAGS = $(WARNING_CFLAGS)
 
 noinst_LIBRARIES = libbison.a
diff --git a/src/Makefile.am b/src/Makefile.am
index 557cff7e..7a388a06 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -15,8 +15,6 @@
 ## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 ## 02111-1307  USA
 
-AUTOMAKE_OPTIONS = ../lib/ansi2knr
-
 DEFS = @DEFS@ \
   -DPKGDATADIR=\"$(pkgdatadir)\" \
   -DLOCALEDIR=\"$(datadir)/locale\"