diff --git a/media/libstagefright/codecs/aacenc/inc/aacenc_core.h b/media/libstagefright/codecs/aacenc/inc/aacenc_core.h
index 1acdbbc..bb75b6d 100644
--- a/media/libstagefright/codecs/aacenc/inc/aacenc_core.h
+++ b/media/libstagefright/codecs/aacenc/inc/aacenc_core.h
@@ -102,7 +102,7 @@
                     const UWord8       *ancBytes,      /*!< pointer to ancillary data bytes */
                     Word16             *numAncBytes,   /*!< number of ancillary Data Bytes, send as fill element  */
                     UWord8             *outBytes,      /*!< pointer to output buffer            */
-                    Word32             *numOutBytes    /*!< number of bytes in output buffer */
+                    VO_U32             *numOutBytes    /*!< number of bytes in output buffer */
                     );
 
 /*---------------------------------------------------------------------------
diff --git a/media/libstagefright/codecs/aacenc/src/aacenc_core.c b/media/libstagefright/codecs/aacenc/src/aacenc_core.c
index 2b3bd48..cecbc8f 100644
--- a/media/libstagefright/codecs/aacenc/src/aacenc_core.c
+++ b/media/libstagefright/codecs/aacenc/src/aacenc_core.c
@@ -146,7 +146,7 @@
                     const UWord8 *ancBytes,     /*!< pointer to ancillary data bytes */
                     Word16 *numAncBytes,		/*!< number of ancillary Data Bytes */
                     UWord8 *outBytes,           /*!< pointer to output buffer (must be large MINBITS_COEF/8*MAX_CHANNELS bytes) */
-                    Word32 *numOutBytes         /*!< number of bytes in output buffer after processing */
+                    VO_U32 *numOutBytes         /*!< number of bytes in output buffer after processing */
                     )
 {
   ELEMENT_INFO *elInfo = &aacEnc->elInfo;