diff --git a/expr.1 b/expr.1
index 16164c4..688c088 100644
--- a/expr.1
+++ b/expr.1
@@ -83,15 +83,15 @@ resolve equally to a failed match. To work around this limitation, use
 .Bl -tag -width Ds
 .It 0
 .Ar expression
-is neither an empty string nor 0
+is neither an empty string nor 0.
 .It 1
 .Ar expression
-is an empty string or 0
+is an empty string or 0.
 .It 2
 .Ar expression
-is invalid
+is invalid.
 .It > 2
-An error occurred
+An error occurred.
 .El
 .Sh SEE ALSO
 .Xr test 1