diff --git a/media/libstagefright/codecs/amrnb/enc/SoftAMRNBEncoder.cpp b/media/libstagefright/codecs/amrnb/enc/SoftAMRNBEncoder.cpp
index 50b739c..c6300a8 100644
--- a/media/libstagefright/codecs/amrnb/enc/SoftAMRNBEncoder.cpp
+++ b/media/libstagefright/codecs/amrnb/enc/SoftAMRNBEncoder.cpp
@@ -71,7 +71,7 @@
     def.eDir = OMX_DirInput;
     def.nBufferCountMin = kNumBuffers;
     def.nBufferCountActual = def.nBufferCountMin;
-    def.nBufferSize = kNumSamplesPerFrame * sizeof(int16_t);
+    def.nBufferSize = kNumSamplesPerFrame * sizeof(int16_t) * 4;
     def.bEnabled = OMX_TRUE;
     def.bPopulated = OMX_FALSE;
     def.eDomain = OMX_PortDomainAudio;
diff --git a/media/libstagefright/codecs/amrwbenc/SoftAMRWBEncoder.cpp b/media/libstagefright/codecs/amrwbenc/SoftAMRWBEncoder.cpp
index 9ccb49c..afd2b32 100644
--- a/media/libstagefright/codecs/amrwbenc/SoftAMRWBEncoder.cpp
+++ b/media/libstagefright/codecs/amrwbenc/SoftAMRWBEncoder.cpp
@@ -78,7 +78,7 @@
     def.eDir = OMX_DirInput;
     def.nBufferCountMin = kNumBuffers;
     def.nBufferCountActual = def.nBufferCountMin;
-    def.nBufferSize = kNumSamplesPerFrame * sizeof(int16_t);
+    def.nBufferSize = kNumSamplesPerFrame * sizeof(int16_t) * 4;
     def.bEnabled = OMX_TRUE;
     def.bPopulated = OMX_FALSE;
     def.eDomain = OMX_PortDomainAudio;