diff --git a/lib_com/options.h b/lib_com/options.h
index 2d952edea1c07d027b34534746ed747fc1b33ec1..39f6b51f0861ac9051227e5aeac7ef92a6850d15 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -188,6 +188,8 @@
 #define NONBE_FIX_968_ISM_BRIR_WITH_HEADROTATION_5MS_FIX      /* FhG : issue #968: differences between 5ms and 20ms rendering for discrete ISM with BRIR and head rotation*/
 #define FIX_969_USAN_IGF_ARITH                          /* FhG: issue 969: fix USAN error in igf_sce_dec; same issue as #962 */
 #define FIX_959_MASA_LINEAR_REND                        /* VA: issue 959: remove unused calling of ivas_sba_linear_renderer() in MASA rendering */
+#define FIX_971_LOG2_IDX_GAIN_0                         /* VA: prevent -Inf due to log2(ratio==0)  */
+
 
 /* #################### End BASOP porting switches ############################ */
 
diff --git a/lib_enc/swb_tbe_enc.c b/lib_enc/swb_tbe_enc.c
index 70c8797bd088ac393816f318664afac1fd33c609..3b5b4da9f16e68cb3928f5eab8377b9b6efe0fe2 100644
--- a/lib_enc/swb_tbe_enc.c
+++ b/lib_enc/swb_tbe_enc.c
@@ -2753,6 +2753,12 @@ void fb_tbe_enc(
     hBWE_TD->prev_fb_energy = sum2_f( input_fhb + L_FRAME48k / 2, L_FRAME48k / 2 );
     fb_exc_energy = sum2_f( fb_exc, L_FRAME16k ) + EPSILON;
     ratio = (float) sqrt( temp2 / fb_exc_energy );
+#ifdef FIX_971_LOG2_IDX_GAIN_0
+    if ( ratio < 1.0f )
+    {
+        ratio = 1.0f;
+    }
+#endif
     idxGain = (int16_t) ( log2_f( (float) ratio ) + 0.5f );
     idxGain = max( 0, min( 15, idxGain ) );
     ratio = (float) ( 1 << idxGain );