diff --git a/libgfortran/ChangeLog b/libgfortran/ChangeLog
index b2917dbd0e90..a2ae060921d7 100644
--- a/libgfortran/ChangeLog
+++ b/libgfortran/ChangeLog
@@ -1,3 +1,9 @@
+2015-08-28  James Greenhalgh  <james.greenhalgh@arm.com>
+
+	* configure.ac: Define HAVE_FTRUNCATE for ARM/AArch64/SH newlib
+	builds.
+	* configure: Regenerate.
+
 2015-08-18  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>
 
 	PR libfortran/66936
diff --git a/libgfortran/configure b/libgfortran/configure
index e1592f732492..bb3107bb2f96 100755
--- a/libgfortran/configure
+++ b/libgfortran/configure
@@ -16525,6 +16525,15 @@ $as_echo "#define HAVE_STRTOK_R 1" >>confdefs.h
 $as_echo "#define HAVE_STRTOLD 1" >>confdefs.h
 
    fi
+
+  # ARM, AArch64 and SH also provide ftruncate.
+  case "${host}" in
+     arm* | aarch64* | sh*)
+
+$as_echo "#define HAVE_FTRUNCATE 1" >>confdefs.h
+
+       ;;
+  esac
 else
 
 
diff --git a/libgfortran/configure.ac b/libgfortran/configure.ac
index 35a8b395885f..adafb3f1f4a9 100644
--- a/libgfortran/configure.ac
+++ b/libgfortran/configure.ac
@@ -295,6 +295,13 @@ if test "x${with_newlib}" = "xyes"; then
    if test x"long_double_math_on_this_cpu" = x"yes"; then
      AC_DEFINE(HAVE_STRTOLD, 1, [Define if you have strtold.])
    fi
+
+  # ARM, AArch64 and SH also provide ftruncate.
+  case "${host}" in
+     arm* | aarch64* | sh*)
+       AC_DEFINE(HAVE_FTRUNCATE, 1, [Define if you have ftruncate.])
+       ;;
+  esac
 else
    AC_CHECK_FUNCS_ONCE(getrusage times mkstemp strtof strtold snprintf \
    ftruncate chsize chdir getlogin gethostname kill link symlink sleep ttyname \