diff --git a/meta/recipes-extended/which/which-2.21/automake.patch b/meta/recipes-extended/which/which-2.21/automake.patch
new file mode 100644
index 0000000..4d0f2e4
--- /dev/null
+++ b/meta/recipes-extended/which/which-2.21/automake.patch
@@ -0,0 +1,19 @@
+Update autoconf prologue to use "foreign" strictness.
+
+Upstream-Status: Pending
+Signed-off-by: Ross Burton <ross.burton@intel.com>
+
+diff --git a/configure.ac b/configure.ac
+index d974461..a20dfa8 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -1,7 +1,7 @@
+ dnl Process this file with autoconf to produce a configure script.
+ AC_INIT([which], [2.21])
+ AC_CONFIG_SRCDIR(which.c)
+-AM_INIT_AUTOMAKE
++AM_INIT_AUTOMAKE([foreign])
+ AM_CONFIG_HEADER(config.h)
+ AM_MAINTAINER_MODE
+ 
+