diff --git a/lib_com/options.h b/lib_com/options.h
index 3e11805fcc15d132eae7fadd29420369ba9e6ad5..830289a97bd2621d269c4977d31f0790b1482dd7 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -81,6 +81,7 @@
 #define FIX_1970_SBA_CRASH                                   /* Dlb: Fix for issue 1970, SBA crash */
 
 #define FIX_1978_SAT_MISSING_IN_GAIN_ENC                     /* VA:  Fix add saturation missing that lead to a crash in P800-10 */
+#define FIX_1981_MAXIMUM_EXP_FX                              /* FhG: Fix bug in function to find maximum value in vector */
 
 #define FIX_1979_SAT_MISSING_IN_LSF_ENC                      /* VA: Proposal to fix 1979, saturation in lsf_enc, NOkia to review */
 #define FIX_1946_CRASH_JBM_PROCESSING                        /* FhG: Increased guard bits of DFT_fx */
diff --git a/lib_com/tools_fx.c b/lib_com/tools_fx.c
index f175f14b644b782859475161298002d10f123d95..4dd405b248a1d36317932b40d64437997ca3c1fb 100644
--- a/lib_com/tools_fx.c
+++ b/lib_com/tools_fx.c
@@ -1219,6 +1219,26 @@ Word16 maximum_exp_fx(                        /* o  : index of the maximum value
                        const Word16 *exp_vec, /* i  : exponents of input vector                      */
                        const Word16 lvec_fx   /* i  : length of input vector                         */
 )
+#ifdef FIX_1981_MAXIMUM_EXP_FX
+{
+    Word16 j, ind;
+    ind = 0;
+    move16();
+
+    FOR( j = 1; j < lvec_fx; j++ )
+    {
+        /* if(vec[j] > vec[ind])                                                                                                    //means   */
+        /* if( GT_32(    L_shr_sat( L_deposit_l( vec_fx[j])), sub( exp_vec[ind], exp_vec[j] )  , L_deposit_l( vec_fx[ind] )))   //is like */
+        if ( L_mac0_sat( L_shl_sat( L_deposit_l( vec_fx[j] ), sub( exp_vec[j], exp_vec[ind] ) ), vec_fx[ind], -0x0001 ) > 0 )
+        {
+            ind = j;
+            move16();
+        }
+    }
+
+    return ind;
+}
+#else
 {
     Word16 j, ind;
     Word16 tmp, exp;
@@ -1244,6 +1264,7 @@ Word16 maximum_exp_fx(                        /* o  : index of the maximum value
 
     return ind;
 }
+#endif
 
 /*---------------------------------------------------------------------*
  * maximum_abs_16_fx()