--- /dev/null
+From 96465be0f4ac225cfe6f52b809c91b9496807eac Mon Sep 17 00:00:00 2001
+From: Michael Heimpold <mhei@heimpold.de>
+Date: Sun, 26 Nov 2017 18:29:42 +0100
+Subject: [PATCH] ext/imap/config.m4: fix ac_cv_u8t_decompose check
+
+Once upon the time, commit c58f63a38ae19caaab339c61486fc3bd7e5894f9
+changed the check from U8T_CANONICAL to U8T_DECOMPOSE. However,
+the autoconf cache id was not renamed.
+
+Sometimes it is desirable to preseed the autoconf variables, e.g. when
+cross-compiling to avoid the tests running on the host system. In this
+case it's confusing when the cache id does not match the variable to
+set, so let's adjust it.
+
+Signed-off-by: Michael Heimpold <mhei@heimpold.de>
+---
+ ext/imap/config.m4 | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/ext/imap/config.m4 b/ext/imap/config.m4
+index d0b86cb..badb6e2 100644
+--- a/ext/imap/config.m4
++++ b/ext/imap/config.m4
+@@ -147,7 +147,7 @@ if test "$PHP_IMAP" != "no"; then
+
+ old_CFLAGS=$CFLAGS
+ CFLAGS="-I$IMAP_INC_DIR"
+- AC_CACHE_CHECK(for U8T_DECOMPOSE, ac_cv_u8t_canonical,
++ AC_CACHE_CHECK(for U8T_DECOMPOSE, ac_cv_u8t_decompose,
+ AC_TRY_COMPILE([
+ #include <c-client.h>
+ ],[
+--
+2.7.4
+