diff --git a/cfg/encoder_lowdelay_P_vtm.cfg b/cfg/encoder_lowdelay_P_vtm.cfg
index 35b2291f4762f1177be73214459901519073c59d..8f7b27015adcf23387d89264c3c8d2f40d5a7500 100644
--- a/cfg/encoder_lowdelay_P_vtm.cfg
+++ b/cfg/encoder_lowdelay_P_vtm.cfg
@@ -139,6 +139,7 @@ MmvdDisNum                   : 6
 ALFStrength                  : 1.0
 ALFAllowPredefinedFilters    : 1
 CCALFStrength                : 1.0
+EncDbOpt                     : 1      # apply deblocking in RDO
 ### DO NOT ADD ANYTHING BELOW THIS LINE ###
 ### DO NOT DELETE THE EMPTY LINE BELOW ###
 
diff --git a/cfg/encoder_lowdelay_vtm.cfg b/cfg/encoder_lowdelay_vtm.cfg
index 5818fb1f7ad45e3d7a5c6e2cac34fa77ca7a4406..3abc2295cdbe5b83117b5a6088126adff7b93e6a 100644
--- a/cfg/encoder_lowdelay_vtm.cfg
+++ b/cfg/encoder_lowdelay_vtm.cfg
@@ -143,6 +143,7 @@ MmvdDisNum                   : 6
 ALFStrength                  : 1.0
 ALFAllowPredefinedFilters    : 1
 CCALFStrength                : 1.0
+EncDbOpt                     : 1      # apply deblocking in RDO
 ### DO NOT ADD ANYTHING BELOW THIS LINE ###
 ### DO NOT DELETE THE EMPTY LINE BELOW ###
 
diff --git a/cfg/encoder_randomaccess_vtm.cfg b/cfg/encoder_randomaccess_vtm.cfg
index f8451b9edbe8affc6b952f4e95f4f19b5ca653e1..6ccc2eea16ce21910e5a91a675b683c68b58c0f2 100644
--- a/cfg/encoder_randomaccess_vtm.cfg
+++ b/cfg/encoder_randomaccess_vtm.cfg
@@ -173,6 +173,7 @@ TemporalFilter                : 1           # Enable/disable GOP Based Temporal
 TemporalFilterFutureReference : 1           # Enable/disable reading future frames
 TemporalFilterStrengthFrame8  : 0.95        # Enable filter at every 8th frame with given strength
 TemporalFilterStrengthFrame16 : 1.5         # Enable filter at every 16th frame with given strength, longer intervals has higher priority
+EncDbOpt                     : 1      # apply deblocking in RDO
 ### DO NOT ADD ANYTHING BELOW THIS LINE ###
 ### DO NOT DELETE THE EMPTY LINE BELOW ###
 
diff --git a/cfg/encoder_randomaccess_vtm_gop16.cfg b/cfg/encoder_randomaccess_vtm_gop16.cfg
index a3a6984d2fca4f906ec01ede78770483dec262c9..d6cac06710f629a016de480d3638ed44b0ba1801 100644
--- a/cfg/encoder_randomaccess_vtm_gop16.cfg
+++ b/cfg/encoder_randomaccess_vtm_gop16.cfg
@@ -157,6 +157,7 @@ TemporalFilter                : 1           # Enable/disable GOP Based Temporal
 TemporalFilterFutureReference : 1           # Enable/disable reading future frames
 TemporalFilterStrengthFrame8  : 0.95        # Enable filter at every 8th frame with given strength
 TemporalFilterStrengthFrame16 : 1.5         # Enable filter at every 16th frame with given strength, longer intervals has higher priority
+EncDbOpt                     : 1      # apply deblocking in RDO
 ### DO NOT ADD ANYTHING BELOW THIS LINE ###
 ### DO NOT DELETE THE EMPTY LINE BELOW ###