diff --git a/lib_com/options.h b/lib_com/options.h
index 09300d64f7d59afe202b47e3bf508583a9f41d2a..ac427455ffd6c55148b0ba3af0ab0942a6ae4591 100755
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -152,6 +152,7 @@
 #define FIX_BASOP_2519_TCA_LA_ZERO_EXP                  /* FhG: BASOP #2519: Exclude zero samples from exp_com calculation in tcaTargetCh_LA_fx */
 #define FIX_BASOP_2519_ICBWE_DEC_Q_TRACK                /* FhG: BASOP #2519: Track Q-format of dec_2over3_mem_fx across frames in stereo_icBWE_preproc_fx */
 #define FIX_BASOP_2592_OVERFLOW                         /* FhG: BASOP #2592: fix overflow in GetF0() */
+#define FIX_BASOP_2591_EDGE_DETECT_COMP                 /* FhG: BASOP #2591: Wrong comparison in edge_detect_fx() */
 
 /* ##################### End NON-BE switches ########################### */
 
diff --git a/lib_enc/ivas_stereo_classifier_fx.c b/lib_enc/ivas_stereo_classifier_fx.c
index 621a00bd4b41784868b153a945ba844fa2c196f1..f38e7c9158f2670e404024ab06782860335b4334 100644
--- a/lib_enc/ivas_stereo_classifier_fx.c
+++ b/lib_enc/ivas_stereo_classifier_fx.c
@@ -1583,7 +1583,11 @@ static void edge_detect_fx(
         set_zero_fx( edge, EDGE_MAX_LEN );
 
         /* set error at 0th index */
+#ifdef FIX_BASOP_2591_EDGE_DETECT_COMP
+        IF( GT_32( L_shr( inp[0], 3 ), inp_max ) )
+#else
         IF( GT_32( L_shr( inp[0], 6 ), inp_max ) )
+#endif
         {
             err0 = 0;
             move32();