diff --git a/jdk/src/java.base/share/classes/sun/security/ssl/ClientHandshaker.java b/jdk/src/java.base/share/classes/sun/security/ssl/ClientHandshaker.java
index cb4f54eb125..ea4d2a404fc 100644
--- a/jdk/src/java.base/share/classes/sun/security/ssl/ClientHandshaker.java
+++ b/jdk/src/java.base/share/classes/sun/security/ssl/ClientHandshaker.java
@@ -293,7 +293,7 @@ final class ClientHandshaker extends Handshaker {
             case K_ECDH_RSA:
                 throw new SSLProtocolException(
                     "Protocol violation: server sent a server key exchange"
-                    + "message for key exchange " + keyExchange);
+                    + " message for key exchange " + keyExchange);
             case K_KRB5:
             case K_KRB5_EXPORT:
                 throw new SSLProtocolException(