diff --git a/lib_com/hq2_bit_alloc.c b/lib_com/hq2_bit_alloc.c
index b46f54480e78f00ab8bad762c518b94468c40fdd..270c1306175779e042f4fc34728630f0a6e861dd 100644
--- a/lib_com/hq2_bit_alloc.c
+++ b/lib_com/hq2_bit_alloc.c
@@ -375,6 +375,13 @@ void hq2_bit_alloc_har(
 
     Word32 L_y[BANDS_MAX];
 
+#ifdef FIX_150
+#ifdef BASOP_NOGLOB
+    Flag Overflow;
+    Overflow = 0;
+#endif
+#endif
+
     grp_rngmax_fx[0] = 0;
     grp_rngmax_fx[1] = 0;
 
@@ -639,7 +646,16 @@ void hq2_bit_alloc_har(
 
     L_temp = Mpy_32_16( L_Ravg_sub[GRP_SB - 1], sub( GRP_SB, 1 ) ); /* Qbe+0+1 */
     L_temp = Mpy_32_16( L_temp, Inv_norm_sum_fx );                  /* Qbe+1+QIpb+1 */
+#ifdef FIX_150
+#ifdef BASOP_NOGLOB
+    lf_hf_ge_r_fx = round_fx_o( L_shl_o( L_temp, sub( 15 + 16, sub( add( SWB_BWE_LR_Qbe, QIns ), 30 ) ), &Overflow ), &Overflow );
+    Overflow = 0; /* reset BASOP Overflow */
+#else
     lf_hf_ge_r_fx = round_fx( L_shl( L_temp, sub( 15 + 16, sub( add( SWB_BWE_LR_Qbe, QIns ), 30 ) ) ) );
+#endif
+#else
+    lf_hf_ge_r_fx = round_fx( L_shl( L_temp, sub( 15 + 16, sub( add( SWB_BWE_LR_Qbe, QIns ), 30 ) ) ) );
+#endif
 
     exp_normn = norm_s( norm_sum_fx );
     exp_normn = sub( exp_normn, 1 );
diff --git a/lib_com/options.h b/lib_com/options.h
index b462e5ec50e92c88facfc16130298d349d5c817b..e46be24d689dedd163775c3fd0a07757e1988bef 100755
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -151,6 +151,7 @@
 #define FIX_ITD                                         /* Contribution 16: TD renderer ITD improvement and code cleanup */
 #define BRATE_SWITCHING_RENDERING                       /* Bitrate switching changes related to the renderers */
 #define FIX_ISM_DECODER_PRINTOUT                        /* Issue 229: fix ISM decoder printout */
+#define FIX_150                                         /* Issue 150: Crash in EVS mono, HQ_HARMONIC mode, related to BASOP_NOGLOB */
 #define FIX_REND_ISM_XFADE                              /* Issue 193: Crossfade inconsistencies in ISM between decoder and external renderer */
 #define FIX_REND_ISM_POS_ROUNDING                       /* Issue 193: (Temporary solution until fix for #215) Align rounding of ISM position data in external renderer */
 #define FIX_REND_ISM_STEREO_PANNING                     /* Issue 193: Use tangent panning for ISM to stereo in external renderer */
@@ -163,7 +164,6 @@
 #define IMPROVE_CMDLINE_ROBUSTNESS                      /* Issue 233: Improve robustness of command-line parameters */
 #define FIX_MDCT_AND_MC_MONO_ISSUES                     /* Issue 242: Fix some issues with TCX-LTP and delay alignement for mono output */
 
-
 /* ################## End DEVELOPMENT switches ######################### */
 /* clang-format on */
 #endif
diff --git a/lib_enc/swb_bwe_enc.c b/lib_enc/swb_bwe_enc.c
index 54e786d7616073b63b86b98b092e6586df8b6b8b..01c586fcbc882c2219837964400594a97e2500d0 100644
--- a/lib_enc/swb_bwe_enc.c
+++ b/lib_enc/swb_bwe_enc.c
@@ -1795,6 +1795,13 @@ void hq_generic_hf_encoding(
     {
         Word16 tmp, frac, exp;
         Word32 L_tmp;
+#ifdef FIX_150
+#ifdef BASOP_NOGLOB
+        Flag Overflow;
+
+        Overflow = 0;
+#endif
+#endif
         tmp = add( (int16_t) ( hq_generic_fenv[n_band] * 256 ), (int16_t) ( Mean_env[n_band] * 256 ) ); /*Q8 */
 
         L_tmp = L_mult( tmp, 21771 );       /* 0.166096 in Q17 -> Q26 */
@@ -1805,7 +1812,15 @@ void hq_generic_hf_encoding(
         /* output of Pow2() will be: */
         /* 16384 < Pow2() <= 32767 */
         exp = sub( exp, 13 );
-        tmp = shl( tmp, add( exp, 1 ) );              /*Q1 */
+#ifdef FIX_150
+#ifdef BASOP_NOGLOB
+        tmp = shl_o( tmp, add( exp, 1 ), &Overflow ); /*Q1 */
+#else
+        tmp = shl( tmp, add( exp, 1 ) ); /*Q1 */
+#endif
+#else
+        tmp = shl( tmp, add( exp, 1 ) ); /*Q1 */
+#endif
         hq_generic_fenv[n_band] = (float) tmp * 0.5f; /*Q1 */
     }