diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/transport/ChainingCredentialsProvider.java b/org.eclipse.jgit/src/org/eclipse/jgit/transport/ChainingCredentialsProvider.java
index 5e1eb3c49..3941d3c55 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/transport/ChainingCredentialsProvider.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/transport/ChainingCredentialsProvider.java
@@ -127,11 +127,4 @@ public class ChainingCredentialsProvider extends CredentialsProvider {
 		}
 		return false;
 	}
-
-	private boolean isAnyNull(CredentialItem... items) {
-		for (CredentialItem i : items)
-			if (i == null)
-				return true;
-		return false;
-	}
 }
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/transport/CredentialsProvider.java b/org.eclipse.jgit/src/org/eclipse/jgit/transport/CredentialsProvider.java
index 464d0f9ee..4800f6826 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/transport/CredentialsProvider.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/transport/CredentialsProvider.java
@@ -80,6 +80,20 @@ public abstract class CredentialsProvider {
 		defaultProvider = p;
 	}
 
+	/**
+	 * @param items
+	 *            credential items to check
+	 * @return {@code true} if any of the passed items is null, {@code false}
+	 *         otherwise
+	 * @since 4.2
+	 */
+	protected static boolean isAnyNull(CredentialItem... items) {
+		for (CredentialItem i : items)
+			if (i == null)
+				return true;
+		return false;
+	}
+
 	/**
 	 * Check if the provider is interactive with the end-user.
 	 *
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/transport/NetRCCredentialsProvider.java b/org.eclipse.jgit/src/org/eclipse/jgit/transport/NetRCCredentialsProvider.java
index 74909998c..4037545e9 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/transport/NetRCCredentialsProvider.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/transport/NetRCCredentialsProvider.java
@@ -105,12 +105,11 @@ public class NetRCCredentialsProvider extends CredentialsProvider {
 			throw new UnsupportedCredentialItem(uri, i.getClass().getName()
 					+ ":" + i.getPromptText()); //$NON-NLS-1$
 		}
-		return true;
+		return !isAnyNull(items);
 	}
 
 	@Override
 	public boolean isInteractive() {
 		return false;
 	}
-
 }