diff --git a/lib_com/options.h b/lib_com/options.h
index 92c5871eb0bf1c38039df9d2680804147f121880..488defa924c15ed18d677cd2b1057868a95ed729 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -100,6 +100,7 @@
 #define FIX_ISSUE_2013_MDCT_STEREO_FER_DISCONTINUITIES       /* Eri/FhG: Issue 2013 fix for FER discontinuities */
 #define FIX_2000_NON_LINEARITY_OVERSHOOT                     /* Eri: Issue 2000: SWB TBE energy overshoot in non-linearity. Aligns with float */
 #define FIX_2010_PREP_TBE_EXC                                /* FhG: fix issues with varying Q-values for code_preQ_fx[] */
+#define FIX_2025_FDCNG_MULT                                  /* Nokia, FhG: Fix LB FDCNG noise introduced by changing mult to i_mult */
 
 /* #################### Start BASOP porting switches ############################ */
 
diff --git a/lib_dec/fd_cng_dec_fx.c b/lib_dec/fd_cng_dec_fx.c
index 000ef2ef3841379c80d7d2097610ad0eb2d5905d..d3b9634522e9c7e7ed83c4c2a6784a0ac57c2ca7 100644
--- a/lib_dec/fd_cng_dec_fx.c
+++ b/lib_dec/fd_cng_dec_fx.c
@@ -4996,17 +4996,29 @@ void generate_masking_noise_lb_dirac_fx(
            overwriting it with the synthesis in case of shared tc and synth channel memory, i.e. non-TSM mode */
         slot_size_cng = shr( hFdCngCom->frameSize, 4 /* DEFAULT_JBM_CLDFB_TIMESLOTS */ );
         /* move start indices forward to the end of the last subframe */
+#ifdef FIX_2025_FDCNG_MULT
+        cur_subframe_start_outfs = i_mult( nCldfbTs, hSpatParamRendCom->slot_size );
+        cur_subframe_start_cngfs = i_mult( nCldfbTs, slot_size_cng );
+#else
         cur_subframe_start_outfs = mult( nCldfbTs, hSpatParamRendCom->slot_size );
         cur_subframe_start_cngfs = mult( nCldfbTs, slot_size_cng );
+#endif
 
         /* go from the last subframe back and move the LB noise */
         FOR( cur_subframe = sub( hSpatParamRendCom->nb_subframes, 1 ); cur_subframe >= 0; cur_subframe-- )
         {
             Word16 move_size, subframe_size_outfs;
+#ifdef FIX_2025_FDCNG_MULT
+            move_size = i_mult( slot_size_cng, hSpatParamRendCom->subframe_nbslots[cur_subframe] );
+            subframe_size_outfs = i_mult( hSpatParamRendCom->subframe_nbslots[cur_subframe], hSpatParamRendCom->slot_size );
+            cur_subframe_start_outfs = sub( cur_subframe_start_outfs, i_mult( hSpatParamRendCom->subframe_nbslots[cur_subframe], hSpatParamRendCom->slot_size ) );
+            cur_subframe_start_cngfs = sub( cur_subframe_start_cngfs, i_mult( hSpatParamRendCom->subframe_nbslots[cur_subframe], slot_size_cng ) );
+#else
             move_size = mult( slot_size_cng, hSpatParamRendCom->subframe_nbslots[cur_subframe] );
             subframe_size_outfs = mult( hSpatParamRendCom->subframe_nbslots[cur_subframe], hSpatParamRendCom->slot_size );
             cur_subframe_start_outfs = sub( cur_subframe_start_outfs, mult( hSpatParamRendCom->subframe_nbslots[cur_subframe], hSpatParamRendCom->slot_size ) );
             cur_subframe_start_cngfs = sub( cur_subframe_start_cngfs, mult( hSpatParamRendCom->subframe_nbslots[cur_subframe], slot_size_cng ) );
+#endif
             /* move cna */
             Copy32( tdBuffer + cur_subframe_start_cngfs, tdBuffer + cur_subframe_start_outfs, move_size );