diff --git a/src/cmd/ksh93/sh/xec.c b/src/cmd/ksh93/sh/xec.c
index 5c673e828..c466f01b1 100644
--- a/src/cmd/ksh93/sh/xec.c
+++ b/src/cmd/ksh93/sh/xec.c
@@ -225,7 +225,7 @@ static void l_time(Sfio_t *outfile,register clock_t t,int precision)
 	if(precision)
 	{
 		frac = t%sh.lim.clk_tck;
-		frac = (frac*100)/sh.lim.clk_tck;
+		frac = (frac*(int)pow(10,precision))/sh.lim.clk_tck;
 	}
 	t /= sh.lim.clk_tck;
 	sec = t%60;
diff --git a/src/cmd/ksh93/tests/builtins.sh b/src/cmd/ksh93/tests/builtins.sh
index a2e0d92bf..8b61aef74 100755
--- a/src/cmd/ksh93/tests/builtins.sh
+++ b/src/cmd/ksh93/tests/builtins.sh
@@ -1516,5 +1516,10 @@ if builtin tail 2> /dev/null; then
 		"(expected $(printf %q "$exp"), got $(printf %q "$got"))"
 fi
 
+# ======
+# ksh93v- accidentally broke the sleep builtin's support for
+# using microseconds in the form of <num>U.
+got=$(sleep 1U 2>&1) || err_exit "sleep builtin cannot handle microseconds in the form of <num>U (got $(printf %q "$got"))"
+
 # ======
 exit $((Errors<125?Errors:125))