diff --git a/proc/pids.c b/proc/pids.c
index 5f9ea1e8..5928e4f6 100644
--- a/proc/pids.c
+++ b/proc/pids.c
@@ -170,6 +170,7 @@ REG_set(ID_FGID,          u_int,   fgid)
 REG_set(ID_FGROUP,        str,     fgroup)
 REG_set(ID_FUID,          u_int,   fuid)
 REG_set(ID_FUSER,         str,     fuser)
+REG_set(ID_LOGIN,         s_int,   luid)
 REG_set(ID_PGRP,          s_int,   pgrp)
 REG_set(ID_PID,           s_int,   tid)
 REG_set(ID_PPID,          s_int,   ppid)
@@ -342,6 +343,7 @@ srtDECL(noop) {
 
 #define f_either   PROC_SPARE_1        // either status or stat (favor stat)
 #define f_grp      PROC_FILLGRP
+#define f_login    PROC_FILL_LUID
 #define f_lxc      PROC_FILL_LXC
 #define f_ns       PROC_FILLNS
 #define f_oom      PROC_FILLOOM
@@ -419,6 +421,7 @@ static struct {
     { RS(ID_FGROUP),         x_ogroup,   NULL,      QS(str),       0,        TS(str)     },
     { RS(ID_FUID),           f_status,   NULL,      QS(u_int),     0,        TS(u_int)   },
     { RS(ID_FUSER),          x_ouser,    NULL,      QS(str),       0,        TS(str)     }, // freefunc NULL w/ cached string
+    { RS(ID_LOGIN),          f_login,    NULL,      QS(s_int),     0,        TS(s_int)   },
     { RS(ID_PGRP),           f_stat,     NULL,      QS(s_int),     0,        TS(s_int)   },
     { RS(ID_PID),            0,          NULL,      QS(s_int),     0,        TS(s_int)   }, // oldflags: free w/ simple_nextpid
     { RS(ID_PPID),           f_either,   NULL,      QS(s_int),     0,        TS(s_int)   },
diff --git a/proc/pids.h b/proc/pids.h
index 96635b1d..f6c15810 100644
--- a/proc/pids.h
+++ b/proc/pids.h
@@ -59,6 +59,7 @@ enum pids_item {
     PIDS_ID_FGROUP,         //     str
     PIDS_ID_FUID,           //   u_int
     PIDS_ID_FUSER,          //     str
+    PIDS_ID_LOGIN,          //   s_int
     PIDS_ID_PGRP,           //   s_int
     PIDS_ID_PID,            //   s_int
     PIDS_ID_PPID,           //   s_int
diff --git a/proc/readproc.c b/proc/readproc.c
index 1fe7ce04..77642f86 100644
--- a/proc/readproc.c
+++ b/proc/readproc.c
@@ -877,6 +877,25 @@ static char *lxc_containers (const char *path) {
     }
     return lxc_none;
 }
+
+
+    // Provide the user id at login (or -1 if not available)
+static int login_uid (const char *path) {
+    char buf[PROCPATHLEN];
+    int fd, id, in;
+
+    id = -1;
+    snprintf(buf, sizeof(buf), "%s/loginuid", path);
+    if ((fd = open(buf, O_RDONLY, 0)) != -1) {
+        in = read(fd, buf, sizeof(buf) - 1);
+        close(fd);
+        if (in > 0) {
+            buf[in] = '\0';
+            id = atoi(buf);
+        }
+    }
+    return id;
+}
 ///////////////////////////////////////////////////////////////////////
 
 
@@ -998,6 +1017,9 @@ static proc_t* simple_readproc(PROCTAB *restrict const PT, proc_t *restrict cons
     if (flags & PROC_FILL_LXC)                  // value the lxc name
         p->lxcname = lxc_containers(path);
 
+    if (flags & PROC_FILL_LUID)                 // value the login user id
+        p->luid = login_uid(path);
+
     if (rc == 0) return p;
     errno = ENOMEM;
 next_proc:
@@ -1132,6 +1154,9 @@ static proc_t* simple_readtask(PROCTAB *restrict const PT, const proc_t *restric
     if (flags & PROC_FILL_LXC)
         t->lxcname = lxc_containers(path);
 
+    if (flags & PROC_FILL_LUID)
+        t->luid = login_uid(path);
+
     if (rc == 0) return t;
     errno = ENOMEM;
 next_task:
diff --git a/proc/readproc.h b/proc/readproc.h
index 7fa09e84..a477570c 100644
--- a/proc/readproc.h
+++ b/proc/readproc.h
@@ -165,6 +165,8 @@ typedef struct proc_t {
         *sd_uunit;      // n/a             systemd user unit id
     char
         *lxcname;       // n/a             lxc container name
+    int
+        luid;           // loginuid        user id at login
 } proc_t;
 
 // PROCTAB: data structure holding the persistent information readproc needs
@@ -223,6 +225,7 @@ typedef struct PROCTAB {
 #define PROC_FILLNS          0x8000 // fill in proc_t namespace information
 #define PROC_FILLSYSTEMD    0x80000 // fill in proc_t systemd information
 #define PROC_FILL_LXC      0x800000 // fill in proc_t lxcname, if possible
+#define PROC_FILL_LUID     0x400000 // fill in proc_t luid (login user id)
 
 #define PROC_LOOSE_TASKS     0x2000 // treat threads as if they were processes