diff --git a/pjmedia/src/test/codec_vectors.c b/pjmedia/src/test/codec_vectors.c
index 7bf3b38..0c4b81c 100644
--- a/pjmedia/src/test/codec_vectors.c
+++ b/pjmedia/src/test/codec_vectors.c
@@ -572,6 +572,9 @@
 	pjmedia_endpt_destroy(endpt);
 	return -7;
     }
+
+    /* Set shift value to zero for the test vectors */
+    pjmedia_codec_g7221_set_pcm_shift(0);
 #endif
 
     PJ_LOG(3,(THIS_FILE,"  encode tests:"));