--- a/configure.ac	2019-10-26 01:41:51.956255868 +0200
+++ b/configure.ac	2019-10-26 01:44:46.098279175 +0200
@@ -79,6 +79,7 @@
 
 PKG_CHECK_MODULES([CONFUSE], [libconfuse])
 PKG_CHECK_MODULES([YAJL], [yajl])
+PKG_CHECK_MODULES([PROC], [libprocps])
 
 case $host_os in
 	linux*)
--- a/i3status.c	2019-10-26 01:41:51.956255868 +0200
+++ b/i3status.c	2019-10-26 01:44:46.098279175 +0200
@@ -35,6 +35,8 @@
 
 #include "i3status.h"
 
+#include "proc/whattime.h"
+
 #define exit_if_null(pointer, ...) \
     {                              \
         if (pointer == NULL)       \
@@ -698,6 +700,10 @@
 
             const char *current = cfg_getnstr(cfg, "order", j);
 
+            if (strcasecmp(current, "uptime") == 0) {
+                printf("UP: %s", sprint_uptime(1));
+            }
+
             CASE_SEC("ipv6") {
                 SEC_OPEN_MAP("ipv6");
                 print_ipv6_info(json_gen, buffer, cfg_getstr(sec, "format_up"), cfg_getstr(sec, "format_down"));
--- a/Makefile.am	2019-10-26 01:41:51.956255868 +0200
+++ b/Makefile.am	2019-10-26 01:44:46.098279175 +0200
@@ -26,6 +26,7 @@
 i3status_CFLAGS = \
 	$(AM_CFLAGS) \
 	$(CONFUSE_CFLAGS) \
+        $(PROC_CFLAGS) \
 	$(YAJL_CFLAGS) \
 	$(PULSE_CFLAGS) \
 	$(NLGENL_CFLAGS) \
@@ -38,6 +39,7 @@
 
 i3status_LDADD = \
 	$(CONFUSE_LIBS) \
+        $(PROC_LIBS) \
 	$(YAJL_LIBS) \
 	$(PULSE_LIBS) \
 	$(NLGENL_LIBS) \