diff --git a/okhttp-protocols/src/main/java/com/squareup/okhttp/internal/spdy/NameValueBlockReader.java b/okhttp-protocols/src/main/java/com/squareup/okhttp/internal/spdy/NameValueBlockReader.java
index 7ae5fdd7e..b95d01381 100644
--- a/okhttp-protocols/src/main/java/com/squareup/okhttp/internal/spdy/NameValueBlockReader.java
+++ b/okhttp-protocols/src/main/java/com/squareup/okhttp/internal/spdy/NameValueBlockReader.java
@@ -85,7 +85,7 @@ class NameValueBlockReader implements Closeable {
       for (int i = 0; i < numberOfPairs; i++) {
         String name = readString();
         String values = readString();
-        if (name.length() == 0) throw new IOException(String.format("name.length == 0"));
+        if (name.length() == 0) throw new IOException("name.length == 0");
         entries.add(name);
         entries.add(values);
       }