diff --git a/bin/df/df.1 b/bin/df/df.1
--- a/bin/df/df.1
+++ b/bin/df/df.1
@@ -29,7 +29,7 @@
 .\"     @(#)df.1	8.3 (Berkeley) 5/8/95
 .\" $FreeBSD$
 .\"
-.Dd October 5, 2020
+.Dd March 11, 2022
 .Dt DF 1
 .Os
 .Sh NAME
@@ -109,6 +109,9 @@
 or
 .Fl H
 options, the number of inodes is scaled by powers of 1000.
+In case the filesystem has no inodes then
+.Sq -
+is displayed instead of the usage percentage.
 .It Fl k
 Use 1024 byte (1 Kibibyte) blocks rather than the default.
 This overrides the
diff --git a/bin/df/df.c b/bin/df/df.c
--- a/bin/df/df.c
+++ b/bin/df/df.c
@@ -561,9 +561,12 @@
 			xo_emit(format, mwp->iused, (intmax_t)used,
 			    mwp->ifree, (intmax_t)sfsp->f_ffree);
 		}
-		xo_emit(" {:inodes-used-percent/%4.0f}{U:%%} ",
-			inodes == 0 ? 100.0 :
-			(double)used / (double)inodes * 100.0);
+		if (inodes == 0)
+			xo_emit(" {:inodes-used-percent/    -}{U:} ");
+		else {
+			xo_emit(" {:inodes-used-percent/%4.0f}{U:%%} ",
+				(double)used / (double)inodes * 100.0);
+		}
 	} else
 		xo_emit("  ");
 	if (strncmp(sfsp->f_mntfromname, "total", MNAMELEN) != 0)