diff --git a/lib_com/options.h b/lib_com/options.h
index 366354dc890d594c3814771366c0b9b3bc016745..743eae30424e69442be40674b50e1985d40c1bdb 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -125,6 +125,7 @@
 #define FIX_740_HQ_CORE_OVA // Proposed fix to solve overlap and add issue for HQ_CORE
 #define FIX_746  // proposed fix to solve low bit-rate frame boundaries issues 
 #define FIX_SATURATION_725  // Propose fix for saturation in AVQ
+#define FIX_737_HQ_ACELP_SWITCH_SCALING_ERROR /* Eri: Proposed fix for issue 737: scaling error in excitation memory after HQ->ACELP switch */
 /* ################## End DEVELOPMENT switches ######################### */
 
 /* clang-format on */
diff --git a/lib_dec/acelp_core_dec_ivas_fx.c b/lib_dec/acelp_core_dec_ivas_fx.c
index 5c76a407c0120f675ce910edd32e7e179348bfa0..078ec95e4c918c72fa03ba461596f2fa526f6dab 100644
--- a/lib_dec/acelp_core_dec_ivas_fx.c
+++ b/lib_dec/acelp_core_dec_ivas_fx.c
@@ -788,6 +788,9 @@ ivas_error acelp_core_dec_ivas_fx(
                 preemph_fx( old_exc_s_fx, st->preemph_fac, L_FRAME16k, &tmpF_fx );
                 Copy(old_exc_s_fx + st->L_frame - M, st->mem_syn2_fx, M );
                 Residu3_fx( Aq_fx, old_exc_s_fx, old_exc_fx + L_EXC_MEM_DEC - st->L_frame, st->L_frame, 0 );
+#ifdef FIX_737_HQ_ACELP_SWITCH_SCALING_ERROR
+                Scale_sig( old_exc_fx + L_EXC_MEM_DEC - st->L_frame, st->L_frame, st->Q_exc );
+#endif
             }
 
             if ( st->last_core != ACELP_CORE && st->element_mode > EVS_MONO )