diff --git a/decoder/drc_src/impd_drc_gain_dec.c b/decoder/drc_src/impd_drc_gain_dec.c
index 0d03b16..c8c5545 100644
--- a/decoder/drc_src/impd_drc_gain_dec.c
+++ b/decoder/drc_src/impd_drc_gain_dec.c
@@ -443,14 +443,14 @@ WORD32 impd_interpolate_drc_gain(ia_interp_params_struct* interp_params_str,
         return (UNEXPECTED_ERROR);
     }
 
-    err = impd_conv_to_linear_domain (interp_params_str, drc_band, gain0, slope0, &gain_t1, &slope_t1);
-    if (err)
-        return (err);
-    err = impd_conv_to_linear_domain (interp_params_str, drc_band, gain1, slope1, &gain_t2, &slope_t2);
-    if (err)
-        return (err);
-
     if (interp_params_str->gain_interpolation_type == GAIN_INTERPOLATION_TYPE_SPLINE) {
+        err = impd_conv_to_linear_domain(interp_params_str, drc_band, gain0, slope0, &gain_t1, &slope_t1);
+        if (err)
+            return (err);
+        err = impd_conv_to_linear_domain (interp_params_str, drc_band, gain1, slope1, &gain_t2, &slope_t2);
+        if (err)
+            return (err);
+
         slope_t1 = slope_t1/(FLOAT32) interp_params_str->delta_tmin;
         slope_t2 = slope_t2/(FLOAT32) interp_params_str->delta_tmin;
         if ((FLOAT32)fabs((FLOAT64)slope_t1) > (FLOAT32)fabs((FLOAT64)slope_t2)) {
@@ -530,11 +530,16 @@ WORD32 impd_interpolate_drc_gain(ia_interp_params_struct* interp_params_str,
             }
         }
     }
-    else {
-        a = (gain_t2 - gain_t1) / (FLOAT32)gain_step_tdomain;
-        b = gain_t1;
+    else{
 
-        result[0] = gain_t1;
+        err = impd_conv_to_linear_domain(interp_params_str, drc_band, gain1, slope1, &gain_t2, &slope_t2);
+        if (err)
+            return (err);
+
+        a = 0;
+        b = gain_t2;
+
+        result[0] = gain_t2;
         result[gain_step_tdomain] = gain_t2;
         for (n=1; n<gain_step_tdomain; n++) {
             FLOAT32 t = (FLOAT32) n;