diff --git a/library/core/src/str/validations.rs b/library/core/src/str/validations.rs
index 093c9c37b60b..f2d1c7378088 100644
--- a/library/core/src/str/validations.rs
+++ b/library/core/src/str/validations.rs
@@ -210,7 +210,7 @@ macro_rules! next {
                         // break if there is a nonascii byte
                         let zu = contains_nonascii(*block);
                         let zv = contains_nonascii(*block.offset(1));
-                        if zu | zv {
+                        if zu || zv {
                             break;
                         }
                     }