diff --git a/okhttp-protocols/src/main/java/com/squareup/okhttp/internal/spdy/Http20Draft09.java b/okhttp-protocols/src/main/java/com/squareup/okhttp/internal/spdy/Http20Draft09.java
index fd465f9c8b1a..307a4a52b6f6 100644
--- a/okhttp-protocols/src/main/java/com/squareup/okhttp/internal/spdy/Http20Draft09.java
+++ b/okhttp-protocols/src/main/java/com/squareup/okhttp/internal/spdy/Http20Draft09.java
@@ -317,6 +317,7 @@ static final class Writer implements FrameWriter {
     @Override public synchronized void connectionHeader() throws IOException {
       if (!client) return; // Nothing to write; servers don't send connection headers!
       out.write(CONNECTION_HEADER);
+      out.flush();
     }
 
     @Override
@@ -409,6 +410,7 @@ void dataFrame(int streamId, byte flags, byte[] data, int offset, int length)
         out.writeInt(i & 0xffffff);
         out.writeInt(settings.get(i));
       }
+      out.flush();
     }
 
     @Override public synchronized void ping(boolean ack, int payload1, int payload2)
@@ -420,6 +422,7 @@ void dataFrame(int streamId, byte flags, byte[] data, int offset, int length)
       frameHeader(length, type, flags, streamId);
       out.writeInt(payload1);
       out.writeInt(payload2);
+      out.flush();
     }
 
     @Override
@@ -436,6 +439,7 @@ public synchronized void goAway(int lastGoodStreamId, ErrorCode errorCode, byte[
       if (debugData.length > 0) {
         out.write(debugData);
       }
+      out.flush();
     }
 
     @Override public synchronized void windowUpdate(int streamId, long windowSizeIncrement)
@@ -449,6 +453,7 @@ public synchronized void goAway(int lastGoodStreamId, ErrorCode errorCode, byte[
       byte flags = FLAG_NONE;
       frameHeader(length, type, flags, streamId);
       out.writeInt((int) windowSizeIncrement);
+      out.flush();
     }
 
     @Override public void close() throws IOException {
diff --git a/okhttp-protocols/src/main/java/com/squareup/okhttp/internal/spdy/Spdy3.java b/okhttp-protocols/src/main/java/com/squareup/okhttp/internal/spdy/Spdy3.java
index 393b6ee00217..75060445aea0 100644
--- a/okhttp-protocols/src/main/java/com/squareup/okhttp/internal/spdy/Spdy3.java
+++ b/okhttp-protocols/src/main/java/com/squareup/okhttp/internal/spdy/Spdy3.java
@@ -369,7 +369,6 @@ public synchronized void synStream(boolean outFinished, boolean inFinished, int
       out.writeInt((flags & 0xff) << 24 | length & 0xffffff);
       out.writeInt(streamId & 0x7fffffff);
       headerBlockBuffer.writeTo(out);
-      out.flush();
     }
 
     @Override public synchronized void rstStream(int streamId, ErrorCode errorCode)