diff --git a/media/libmedia/AudioRecord.cpp b/media/libmedia/AudioRecord.cpp
index 8ae0908..603c16e 100644
--- a/media/libmedia/AudioRecord.cpp
+++ b/media/libmedia/AudioRecord.cpp
@@ -190,6 +190,11 @@
         ALOGE("Invalid format %d", format);
         return BAD_VALUE;
     }
+    // Temporary restriction: AudioFlinger currently supports 16-bit PCM only
+    if (format != AUDIO_FORMAT_PCM_16_BIT) {
+        ALOGE("Format %d is not supported", format);
+        return BAD_VALUE;
+    }
     mFormat = format;
 
     if (!audio_is_input_channel(channelMask)) {
diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index b30e2cf..d510641 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -1227,6 +1227,12 @@
         goto Exit;
     }
 
+    if (format != AUDIO_FORMAT_PCM_16_BIT) {
+        ALOGE("openRecord() invalid format %d", format);
+        lStatus = BAD_VALUE;
+        goto Exit;
+    }
+
     // add client to list
     { // scope for mLock
         Mutex::Autolock _l(mLock);
diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index 2bb6495..5ba64d5 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -4290,8 +4290,7 @@
                                 framesIn = framesOut;
                             mRsmpInIndex += framesIn;
                             framesOut -= framesIn;
-                            if (mChannelCount == mReqChannelCount ||
-                                mFormat != AUDIO_FORMAT_PCM_16_BIT) {
+                            if (mChannelCount == mReqChannelCount) {
                                 memcpy(dst, src, framesIn * mFrameSize);
                             } else {
                                 if (mChannelCount == 1) {
@@ -4305,9 +4304,7 @@
                         }
                         if (framesOut && mFrameCount == mRsmpInIndex) {
                             void *readInto;
-                            if (framesOut == mFrameCount &&
-                                (mChannelCount == mReqChannelCount ||
-                                        mFormat != AUDIO_FORMAT_PCM_16_BIT)) {
+                            if (framesOut == mFrameCount && mChannelCount == mReqChannelCount) {
                                 readInto = buffer.raw;
                                 framesOut = 0;
                             } else {
@@ -4779,8 +4776,12 @@
             reconfig = true;
         }
         if (param.getInt(String8(AudioParameter::keyFormat), value) == NO_ERROR) {
-            reqFormat = (audio_format_t) value;
-            reconfig = true;
+            if ((audio_format_t) value != AUDIO_FORMAT_PCM_16_BIT) {
+                status = BAD_VALUE;
+            } else {
+                reqFormat = (audio_format_t) value;
+                reconfig = true;
+            }
         }
         if (param.getInt(String8(AudioParameter::keyChannels), value) == NO_ERROR) {
             reqChannelCount = popcount(value);
@@ -4918,6 +4919,9 @@
     mChannelMask = mInput->stream->common.get_channels(&mInput->stream->common);
     mChannelCount = popcount(mChannelMask);
     mFormat = mInput->stream->common.get_format(&mInput->stream->common);
+    if (mFormat != AUDIO_FORMAT_PCM_16_BIT) {
+        ALOGE("HAL format %d not supported; must be AUDIO_FORMAT_PCM_16_BIT", mFormat);
+    }
     mFrameSize = audio_stream_frame_size(&mInput->stream->common);
     mBufferSize = mInput->stream->common.get_buffer_size(&mInput->stream->common);
     mFrameCount = mBufferSize / mFrameSize;