diff -uNr maildrop-2.8.3.ORIG/libs/maildrop/configure.ac maildrop-2.8.3/libs/maildrop/configure.ac
--- maildrop-2.8.3.ORIG/libs/maildrop/configure.ac	2017-07-25 22:49:44.044032091 +0100
+++ maildrop-2.8.3/libs/maildrop/configure.ac	2017-07-25 22:50:48.205113368 +0100
@@ -195,6 +195,15 @@
 AC_DEFINE_UNQUOTED(MAXLONGSIZE, $MAXLONGSIZE,
 				[ Maximum character size of a long ])
 
+dnl check for en_US locale
+check_en_US() {
+locale -a | grep en_US.utf8 > /dev/null
+return $?
+}
+AC_MSG_CHECKING([for en_US.utf8])
+AM_CONDITIONAL([HAS_EN_US], [check_en_US])
+AM_COND_IF([HAS_EN_US],[AC_MSG_RESULT([yes])],[AC_MSG_RESULT([not found])])
+
 dnl Checks for library functions.
 
 AC_FUNC_CLOSEDIR_VOID
diff -uNr maildrop-2.8.3.ORIG/libs/maildrop/Makefile.am maildrop-2.8.3/libs/maildrop/Makefile.am
--- maildrop-2.8.3.ORIG/libs/maildrop/Makefile.am	2017-07-25 22:49:44.054032259 +0100
+++ maildrop-2.8.3/libs/maildrop/Makefile.am	2017-07-25 22:51:13.335536823 +0100
@@ -75,9 +75,11 @@
 	maildrop.lsm testsuite.txt.idn testsuite.txt.noidn testsuite2
 
 check-am:
+if HAS_EN_US
 	@chmod +x testsuite
 	./testsuite | cmp -s - $(srcdir)/$(TESTSUITE)
 	@SHELL@ $(srcdir)/testsuite2
+endif
 
 noinst_DATA=maildrop.html maildrop.1 maildropfilter.html maildropfilter.7 \
 	maildropgdbm.html maildropgdbm.7
diff -uNr maildrop-2.8.3.ORIG/libs/rfc2045/configure.ac maildrop-2.8.3/libs/rfc2045/configure.ac
--- maildrop-2.8.3.ORIG/libs/rfc2045/configure.ac	2017-07-25 22:49:44.054032259 +0100
+++ maildrop-2.8.3/libs/rfc2045/configure.ac	2017-07-25 22:50:48.205113368 +0100
@@ -60,6 +60,15 @@
 AC_CHECK_FUNC(strncasecmp,,CFLAGS="$CFLAGS -Dstrncasecmp=strnicmp")
 AC_CHECK_FUNC(strcasecmp,,CFLAGS="$CFLAGS -Dstrcasecmp=stricmp")
 
+dnl check for en_US locale
+check_en_US() {
+locale -a | grep en_US.utf8 > /dev/null
+return $?
+}
+AC_MSG_CHECKING([for en_US.utf8])
+AM_CONDITIONAL([HAS_EN_US], [check_en_US])
+AM_COND_IF([HAS_EN_US],[AC_MSG_RESULT([yes])],[AC_MSG_RESULT([not found])])
+
 AC_ARG_WITH(package, [], package="$withval",
 	[
 		package="$PACKAGE"
diff -uNr maildrop-2.8.3.ORIG/libs/rfc2045/Makefile.am maildrop-2.8.3/libs/rfc2045/Makefile.am
--- maildrop-2.8.3.ORIG/libs/rfc2045/Makefile.am	2017-07-25 22:49:44.054032259 +0100
+++ maildrop-2.8.3/libs/rfc2045/Makefile.am	2017-07-25 22:51:26.555759572 +0100
@@ -76,6 +76,8 @@
 endif
 
 check-am:
+if HAS_EN_US
 	@SHELL@ $(srcdir)/testsuite | cmp -s - $(srcdir)/$(TESTSUITE)
 	@SHELL@ $(srcdir)/testsuitemm | cmp -s - $(srcdir)/testsuitemm.txt
 	@SHELL@ $(srcdir)/testrfc3676parsersuite | diff -U 3 $(srcdir)/testrfc3676parsersuite.txt -
+endif