diff --git a/okhttp/src/main/java/com/squareup/okhttp/HttpUrl.java b/okhttp/src/main/java/com/squareup/okhttp/HttpUrl.java
index 2f0abfa1f..65955c33a 100644
--- a/okhttp/src/main/java/com/squareup/okhttp/HttpUrl.java
+++ b/okhttp/src/main/java/com/squareup/okhttp/HttpUrl.java
@@ -259,7 +259,7 @@ public final class HttpUrl {
   static final String PASSWORD_ENCODE_SET = " \"':;<=>@[]^`{}|/\\?#";
   static final String PATH_SEGMENT_ENCODE_SET = " \"<>^`{}|/\\?#";
   static final String QUERY_ENCODE_SET = " \"'<>#";
-  static final String QUERY_COMPONENT_ENCODE_SET = " \"'<>#&=";
+  static final String QUERY_COMPONENT_ENCODE_SET = " \"'<>#&=^`{}|\\";
   static final String FORM_ENCODE_SET = " \"':;<=>@[]^`{}|/\\?#&!$(),~";
   static final String FRAGMENT_ENCODE_SET = "";