diff --git a/configure b/configure
index b753fe442b..aedf0d6378 100755
--- a/configure
+++ b/configure
@@ -22703,6 +22703,7 @@ for ac_func in \
 	strtoul			\
 	strtoq			\
 	strtouq			\
+	strtoll			\
 	strspn			\
 	sysconf			\
 	usleep			\
diff --git a/configure.in b/configure.in
index 50c4e6802f..606a367c03 100644
--- a/configure.in
+++ b/configure.in
@@ -2473,6 +2473,7 @@ AC_CHECK_FUNCS(		\
 	strtoul			\
 	strtoq			\
 	strtouq			\
+	strtoll			\
 	strspn			\
 	sysconf			\
 	usleep			\
diff --git a/include/portable.h.in b/include/portable.h.in
index 83b0f6354a..2a3551f945 100644
--- a/include/portable.h.in
+++ b/include/portable.h.in
@@ -308,6 +308,9 @@
 /* Define if you have the strtouq function.  */
 #undef HAVE_STRTOUQ
 
+/* Define if you have the strtoll function.  */
+#undef HAVE_STRTOLL
+
 /* Define if you have the sysconf function.  */
 #undef HAVE_SYSCONF