diff --git a/src/utils.ts b/src/utils.ts
index b2ac7fd..fafa927 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -93,7 +93,7 @@ export function hasTrailingSlash(
 /**
  * Removes trailing slash from the URL or pathname.
  *
- * If second argument is is true, it will only remove the trailing slash if it's not part of the query or fragment with cost of more expensive operations.
+ * If second argument is true, it will only remove the trailing slash if it's not part of the query or fragment with cost of more expensive operations.
  *
  * @example
  *
@@ -123,10 +123,9 @@ export function withoutTrailingSlash(
     fragment = input.slice(fragmentIndex);
   }
   const [s0, ...s] = path.split("?");
+  const cleanPath = s0.endsWith("/") ? s0.slice(0, -1) : s0;
   return (
-    (s0.slice(0, -1) || "/") +
-    (s.length > 0 ? `?${s.join("?")}` : "") +
-    fragment
+    (cleanPath || "/") + (s.length > 0 ? `?${s.join("?")}` : "") + fragment
   );
 }
 
diff --git a/test/trailing-slash.test.ts b/test/trailing-slash.test.ts
index 21a1e37..af141d0 100644
--- a/test/trailing-slash.test.ts
+++ b/test/trailing-slash.test.ts
@@ -57,6 +57,8 @@ describe("withoutTrailingSlash, queryParams: false", () => {
     "foo?123": "foo?123",
     "foo/?123": "foo/?123",
     "foo/?123#abc": "foo/?123#abc",
+    "foo/?k=v": "foo/?k=v",
+    "foo/?k=/": "foo/?k=",
   };
 
   for (const input in tests) {
@@ -81,6 +83,10 @@ describe("withoutTrailingSlash, queryParams: true", () => {
     "foo?123": "foo?123",
     "foo/?123": "foo?123",
     "foo/?123#abc": "foo?123#abc",
+    "foo/?k=123": "foo?k=123",
+    "foo?k=/": "foo?k=/",
+    "foo/?k=/": "foo?k=/",
+    "foo/?k=/&x=y#abc": "foo?k=/&x=y#abc",
     "/a/#abc": "/a#abc",
     "/#abc": "/#abc",
   };