diff --git a/codecs_v2/audio/gsm_amr/amr_nb/dec/src/dec_amr.cpp b/codecs_v2/audio/gsm_amr/amr_nb/dec/src/dec_amr.cpp
index 2bd898d..e61fa45 100644
--- a/codecs_v2/audio/gsm_amr/amr_nb/dec/src/dec_amr.cpp
+++ b/codecs_v2/audio/gsm_amr/amr_nb/dec/src/dec_amr.cpp
@@ -1633,7 +1633,7 @@
             {
                 if (st->old_T0 < PIT_MAX)
                 {                               /* Graceful pitch */
-                    st->old_T0 += 1;            /* degradation    */
+                    st->old_T0 += 0;            /* degradation    */
                 }
                 T0 = st->old_T0;
                 T0_frac = 0;