--- a/configure.in
+++ b/configure.in
@@ -42,20 +42,20 @@ case "`${UNAME}`" in
   AC_DEFINE(HAVE_LINUX)
   AC_DEFINE(MY_HDRINCL,3)
 if test x$LEETCC = xyes; then
-    CCOPTS='-Wall -O6 -funroll-loops -ansi -fPIC -DLINUX'
+    CCOPTS='-Wall -O6 -funroll-loops -fPIC -DLINUX'
 else
     CCOPTS="${CFLAGS} -DLINUX"
 fi
     SMBCFLAGS="${CCOPTS} -Wall -DLINUX -DNETGROUP -DALLOW_CHANGE_PASSWORD -DFAST_SHARE_MODES -DNO_ASMSIGNALH -DGLIBC2"
     SMBLFLAGS="-lnsl -lcrypt"
-    CFLAGS="${CCOPTS} -Wall -ansi -fPIC -DLINUX"
+    CFLAGS="${CCOPTS} -Wall -fPIC -DLINUX"
  ;;
  *Darwin* | *Mac* | *MAC*)
   AC_MSG_RESULT(found MAC OS X)
   AC_DEFINE(HAVE_BSD)
   AC_DEFINE(MY_HDRINCL,2)
 if test x$LEETCC = xyes; then
-   CCOPTS='-Wall -O -funroll-loops -ansi -fPIC -DBSD44 -DDARWIN'
+   CCOPTS='-Wall -O -funroll-loops -fPIC -DBSD44 -DDARWIN'
 else
    CCOPTS='-DBSD44 -DOBSD'
 fi
@@ -68,7 +68,7 @@ fi
   AC_DEFINE(HAVE_BSD)
   AC_DEFINE(MY_HDRINCL,2)
 if test x$LEETCC = xyes; then
-   CCOPTS='-Wall -O6 -funroll-loops -ansi -fPIC -DBSD44 -DOBSD'
+   CCOPTS='-Wall -O6 -funroll-loops -fPIC -DBSD44 -DOBSD'
 else
    CCOPTS='-DBSD44 -DOBSD'
 fi
@@ -81,7 +81,7 @@ fi
   AC_DEFINE(HAVE_BSD)
   AC_DEFINE(MY_HDRINCL,2)
 if test x$LEETCC = xyes; then
-    CCOPTS='-Wall -O6 -funroll-loops -ansi -fPIC -DBSD44'
+    CCOPTS='-Wall -O6 -funroll-loops -fPIC -DBSD44'
 else
     CCOPTS='-DBSD44'
 fi
@@ -96,7 +96,7 @@ fi
   AC_CHECK_LIB(socket, socket, [ CLIB="$CLIB -lsocket " ], AC_MSG_ERROR(libsocket not found.))
   AC_CHECK_LIB(nsl, gethostbyname, [ CLIB="$CLIB -lnsl " ], AC_MSG_ERROR(libnsl not found.))
 if test x$LEETCC = xyes; then
-    CCOPTS='-Wall -O6 -funroll-loops -ansi -fPIC -DSOLARIS'
+    CCOPTS='-Wall -O6 -funroll-loops -fPIC -DSOLARIS'
 else
     CCOPTS='-DSOLARIS'
 fi