diff --git a/spring-vault-core/src/main/java/org/springframework/vault/client/VaultEndpoint.java b/spring-vault-core/src/main/java/org/springframework/vault/client/VaultEndpoint.java
index 0661a60b..bc6d0fe0 100644
--- a/spring-vault-core/src/main/java/org/springframework/vault/client/VaultEndpoint.java
+++ b/spring-vault-core/src/main/java/org/springframework/vault/client/VaultEndpoint.java
@@ -169,6 +169,6 @@ public class VaultEndpoint implements Serializable {
 
 	@Override
 	public String toString() {
-		return String.format("%://%:%d", scheme, host, port);
+		return String.format("%s://%s:%d", scheme, host, port);
 	}
 }