diff --git a/Makefile b/Makefile
index 76511045a80cf5da72851d8194742de56282d953..4362297e00d642502f92dc1f4d88dfb727464edd 100644
--- a/Makefile
+++ b/Makefile
@@ -79,9 +79,6 @@ all:
 #
 # Define NO_ICONV if your libc does not properly support iconv.
 #
-# Define NO_ACCURATE_DIFF if your diff program at least sometimes misses
-# a missing newline at the end of the file.
-#
 # Define USE_NSEC below if you want git to care about sub-second file mtimes
 # and ctimes. Note that you need recent glibc (at least 2.2.4) for this, and
 # it will BREAK YOUR LOCAL DIFFS! show-diff and anything using it will likely
@@ -549,9 +546,6 @@ else
 endif
 endif
 endif
-ifdef NO_ACCURATE_DIFF
-	BASIC_CFLAGS += -DNO_ACCURATE_DIFF
-endif
 ifdef NO_PERL_MAKEMAKER
 	export NO_PERL_MAKEMAKER
 endif
diff --git a/configure.ac b/configure.ac
index e153d5382364def42fa062a39148a696e2e49785..7cfb3a0666ef88dca43598ebe879f53787b4efab 100644
--- a/configure.ac
+++ b/configure.ac
@@ -235,9 +235,6 @@ AC_SUBST(NO_SETENV)
 #
 # Define NO_SYMLINK_HEAD if you never want .git/HEAD to be a symbolic link.
 # Enable it on Windows.  By default, symrefs are still used.
-#
-# Define NO_ACCURATE_DIFF if your diff program at least sometimes misses
-# a missing newline at the end of the file.
 
 ## Site configuration (override autodetection)
 ## --with-PACKAGE[=ARG] and --without-PACKAGE