diff --git a/src/shared/mount-util.h b/src/shared/mount-util.h
index 024787912b..c7c89b3345 100644
--- a/src/shared/mount-util.h
+++ b/src/shared/mount-util.h
@@ -13,12 +13,15 @@
 #define TMPFS_LIMITS_EMPTY_OR_ALMOST ",size=4m,nr_inodes=1k"
 #define TMPFS_LIMITS_SYS             TMPFS_LIMITS_EMPTY_OR_ALMOST
 #define TMPFS_LIMITS_SYS_FS_CGROUP   TMPFS_LIMITS_EMPTY_OR_ALMOST
+/* On an extremely small device with only 256MB of RAM, 20% of RAM for /run should be enough for re-exec of
+   PID1 because 16MB of free space is required. */
+#define TMPFS_LIMITS_RUN             ",size=20%,nr_inodes=800k"
 /* 10% of RAM (using 16GB of RAM as a baseline) translates to 400k inodes (assuming 4k each) and 25%
    translates to 1M inodes */
 #define TMPFS_LIMITS_TMP             ",size=10%,nr_inodes=400k"
 #define TMPFS_LIMITS_DEV_SHM         TMPFS_LIMITS_TMP
-#define TMPFS_LIMITS_RUN             TMPFS_LIMITS_TMP
 #define TMPFS_LIMITS_TEMPORARY_FS    TMPFS_LIMITS_TMP
+/* More space for volatile root and /var */
 #define TMPFS_LIMITS_VAR             ",size=25%,nr_inodes=1m"
 #define TMPFS_LIMITS_ROOTFS          TMPFS_LIMITS_VAR
 #define TMPFS_LIMITS_VOLATILE_STATE  TMPFS_LIMITS_VAR