diff --git a/httpclient5/src/main/java/org/apache/hc/client5/http/auth/NTCredentials.java b/httpclient5/src/main/java/org/apache/hc/client5/http/auth/NTCredentials.java
index e9698bba7..7c56c80ad 100644
--- a/httpclient5/src/main/java/org/apache/hc/client5/http/auth/NTCredentials.java
+++ b/httpclient5/src/main/java/org/apache/hc/client5/http/auth/NTCredentials.java
@@ -186,7 +186,7 @@ public class NTCredentials implements Credentials, Serializable {
         if (value == null) {
             return null;
         }
-        final int index = value.indexOf(".");
+        final int index = value.indexOf('.');
         if (index != -1) {
             return value.substring(0, index);
         }
diff --git a/httpclient5/src/main/java/org/apache/hc/client5/http/impl/async/AsyncPushConsumerRegistry.java b/httpclient5/src/main/java/org/apache/hc/client5/http/impl/async/AsyncPushConsumerRegistry.java
index 670486973..f5b803566 100644
--- a/httpclient5/src/main/java/org/apache/hc/client5/http/impl/async/AsyncPushConsumerRegistry.java
+++ b/httpclient5/src/main/java/org/apache/hc/client5/http/impl/async/AsyncPushConsumerRegistry.java
@@ -69,7 +69,7 @@ class AsyncPushConsumerRegistry {
             return null;
         }
         String path = request.getPath();
-        final int i = path.indexOf("?");
+        final int i = path.indexOf('?');
         if (i != -1) {
             path = path.substring(0, i);
         }