diff --git a/configure.in b/configure.in
index 42868442ab..50c4e6802f 100644
--- a/configure.in
+++ b/configure.in
@@ -2471,6 +2471,8 @@ AC_CHECK_FUNCS(		\
 	strstr			\
 	strtol			\
 	strtoul			\
+	strtoq			\
+	strtouq			\
 	strspn			\
 	sysconf			\
 	usleep			\
diff --git a/include/portable.h.in b/include/portable.h.in
index f7e92e2276..83b0f6354a 100644
--- a/include/portable.h.in
+++ b/include/portable.h.in
@@ -302,6 +302,12 @@
 /* Define if you have the strtoul function.  */
 #undef HAVE_STRTOUL
 
+/* Define if you have the strtoq function.  */
+#undef HAVE_STRTOQ
+
+/* Define if you have the strtouq function.  */
+#undef HAVE_STRTOUQ
+
 /* Define if you have the sysconf function.  */
 #undef HAVE_SYSCONF