diff --git a/src/udev/udev-rules.c b/src/udev/udev-rules.c
index 581bbaf345..366f7ba92c 100644
--- a/src/udev/udev-rules.c
+++ b/src/udev/udev-rules.c
@@ -1771,27 +1771,28 @@ static bool token_match_attr(UdevRuleToken *token, sd_device *dev, UdevEvent *ev
         case SUBST_TYPE_PLAIN:
                 if (sd_device_get_sysattr_value(dev, name, &value) < 0)
                         return false;
-                break;
+
+                /* remove trailing whitespace, if not asked to match for it */
+                if (token->attr_match_remove_trailing_whitespace) {
+                        strscpy(vbuf, sizeof(vbuf), value);
+                        value = delete_trailing_chars(vbuf, NULL);
+                }
+
+                return token_match_string(token, value);
+
         case SUBST_TYPE_SUBSYS:
                 if (udev_resolve_subsys_kernel(name, vbuf, sizeof(vbuf), true) < 0)
                         return false;
-                value = vbuf;
-                break;
+
+                /* remove trailing whitespace, if not asked to match for it */
+                if (token->attr_match_remove_trailing_whitespace)
+                        delete_trailing_chars(vbuf, NULL);
+
+                return token_match_string(token, vbuf);
+
         default:
                 assert_not_reached();
         }
-
-        /* remove trailing whitespace, if not asked to match for it */
-        if (token->attr_match_remove_trailing_whitespace) {
-                if (value != vbuf) {
-                        strscpy(vbuf, sizeof(vbuf), value);
-                        value = vbuf;
-                }
-
-                delete_trailing_chars(vbuf, NULL);
-        }
-
-        return token_match_string(token, value);
 }
 
 static int get_property_from_string(char *line, char **ret_key, char **ret_value) {