diff --git a/lib_com/pvq_com_fx.c b/lib_com/pvq_com_fx.c
index a6c0bc462d6757c2a53af013c84dff95f6b44461..be2542de91bbcd64499c9f975c02be0062dfd009 100644
--- a/lib_com/pvq_com_fx.c
+++ b/lib_com/pvq_com_fx.c
@@ -483,7 +483,7 @@ void apply_gain_fx(
     const Word16 *band_end,   /* i  : Sub band end indices                   Q0      */
     const Word16 num_sfm,     /* i  : Number of bands                        Q0      */
     const Word16 *gains,      /* i  : Band gain vector                       Qx     */
-    Word16 *xq                /* i/o: Float synthesis / Gain adjusted synth  Q15/Qx */
+    Word16 *xq                /* i/o: Float synthesis / Gain adjusted synth  Q15/Qx+1 */
 )
 {
     Word16 band, i;
@@ -496,8 +496,10 @@ void apply_gain_fx(
         FOR( i = band_start[band]; i < band_end[band]; i++ )
         {
             /*xq[i] *= g; */
-            xq[i] = mult_r( g, xq[i] );
-            move16(); /*12+15+1-16=12 */
+            xq[i] = mult_r( g, xq[i] ); /*11+15+1-16=11 */
+            xq[i] = shl( xq[i], 1 );    /*Q11 -> Q12 : Align Q for furthur operations*/
+            move16();
+            move16();
         }
     }
 
@@ -514,7 +516,7 @@ void fine_gain_quant_fx(
     const Word16 *ord,       /* i  : Indices for energy order                 Q0  */
     const Word16 num_sfm,    /* i  : Number of bands                          Q0  */
     const Word16 *gain_bits, /* i  : Gain adjustment bits per sub band        Q0  */
-    Word16 *fg_pred,         /* i/o: Predicted gains / Corrected gains        Q12 */
+    Word16 *fg_pred,         /* i/o: Predicted gains / Corrected gains        Q12/Q11 */
     const Word16 *gopt       /* i  : Optimal gains                            Q12 */
 )
 {
@@ -565,9 +567,13 @@ void fine_gain_quant_fx(
             exp1 = sub( 14, exp1 );
 
             L_tmp = L_mult0( fg_pred[band], tmp1 );                      /*12+exp1 */
-            fg_pred[band] = round_fx( L_shl( L_tmp, sub( 16, exp1 ) ) ); /*12+exp1+16-exp1-16=12 */
+            fg_pred[band] = round_fx( L_shl( L_tmp, sub( 15, exp1 ) ) ); /*12+exp1+15-exp1-16=11 */
             move16();
         }
+        ELSE
+        {
+            fg_pred[band] = shr( fg_pred[band], 1 ); // Q12 -> Q11 To align all the fg_pred indices in same Q.
+        }
     }
 
     return;