diff --git a/lib_com/options.h b/lib_com/options.h
index 7a488c673d01cc009cfa9866aed1ada548c4da83..8a41dab35497b6281caaced4db3ccf52a52b8cf6 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -99,6 +99,7 @@
 #define FIX_2424_REMOVE_GAUSS_L2_ENC                    /* VA: basop issue 2424: Remove duplicated code in gauss_L2_ivas_fx() */
 #define FIX_MDCT_STEREO_ENC_STACK                       /* VA: basop issue 2428: Move IGF temporary buffers out of the highest stack */
 #define HARMONIZE_TBE3                                  /* VA: basop issue 2399: Remove duplicated code: TBE, step 3 */
+#define FIX_2459_USAN_AMR_SIDSTART                      /* FhG: basop issue 2459: fix msan complaint */
 
 /* #################### End BE switches ################################## */
 
diff --git a/lib_dec/hf_synth_fx.c b/lib_dec/hf_synth_fx.c
index 7b1124d5805bff94df9efcd8ac3759b4dac18c68..99656ace09ca89ebba8e2d85c6c5b33e3e4265d1 100644
--- a/lib_dec/hf_synth_fx.c
+++ b/lib_dec/hf_synth_fx.c
@@ -994,6 +994,14 @@ void hf_synth_amr_wb_fx(
             move16(); /* qdct */
             pt1++;
         }
+#ifdef FIX_2459_USAN_AMR_SIDSTART
+
+        /* initialize to fix MSAN complaint - array is never actually accessed in this case */
+        FOR( i = 0; i < NB_SUBFR; i++ )
+        {
+            HF_corr_gain[i] = 32767; /* one in Q15 */
+        }
+#endif
     }
 
     q_tmp = Exp16Array( L_FRAME16k, dct_hb );