diff --git a/config/rv32e/config.vh b/config/rv32e/config.vh
index 9f0056fad..5e1f883d4 100644
--- a/config/rv32e/config.vh
+++ b/config/rv32e/config.vh
@@ -179,6 +179,15 @@ localparam ZCA_SUPPORTED = 0;
 localparam ZCF_SUPPORTED = 0;
 localparam ZCD_SUPPORTED = 0;
 
+// K extension instructions                                                                
+localparam ZBKB_SUPPORTED = 0;
+localparam ZBKC_SUPPORTED = 0;
+localparam ZBKX_SUPPORTED = 0;
+localparam ZKNE_SUPPORTED = 0;
+localparam ZKND_SUPPORTED = 0;
+localparam ZK_SUPPORTED = 0;
+localparam ZKNH_SUPPORTED = 0;
+
 // Memory synthesis configuration
 localparam USE_SRAM = 0;
 
diff --git a/config/rv32gc/config.vh b/config/rv32gc/config.vh
index 843f55530..29130e766 100644
--- a/config/rv32gc/config.vh
+++ b/config/rv32gc/config.vh
@@ -180,6 +180,15 @@ localparam ZCA_SUPPORTED = 0;
 localparam ZCF_SUPPORTED = 0;
 localparam ZCD_SUPPORTED = 0;
 
+// K extension instructions                                                                
+localparam ZBKB_SUPPORTED = 0;
+localparam ZBKC_SUPPORTED = 0;
+localparam ZBKX_SUPPORTED = 0;
+localparam ZKNE_SUPPORTED = 0;
+localparam ZKND_SUPPORTED = 0;
+localparam ZK_SUPPORTED = 0;
+localparam ZKNH_SUPPORTED = 0;
+
 // Memory synthesis configuration
 localparam USE_SRAM = 0;
 
diff --git a/config/rv32i/config.vh b/config/rv32i/config.vh
index 81b25bc2b..490937558 100644
--- a/config/rv32i/config.vh
+++ b/config/rv32i/config.vh
@@ -180,6 +180,15 @@ localparam ZCA_SUPPORTED = 0;
 localparam ZCF_SUPPORTED = 0;
 localparam ZCD_SUPPORTED = 0;
 
+// K extension instructions                                                                
+localparam ZBKB_SUPPORTED = 0;
+localparam ZBKC_SUPPORTED = 0;
+localparam ZBKX_SUPPORTED = 0;
+localparam ZKNE_SUPPORTED = 0;
+localparam ZKND_SUPPORTED = 0;
+localparam ZK_SUPPORTED = 0;
+localparam ZKNH_SUPPORTED = 0;
+
 // Memory synthesis configuration
 localparam USE_SRAM = 0;
 
diff --git a/config/rv32imc/config.vh b/config/rv32imc/config.vh
index 931725cc4..357eba840 100644
--- a/config/rv32imc/config.vh
+++ b/config/rv32imc/config.vh
@@ -178,6 +178,15 @@ localparam ZCA_SUPPORTED = 0;
 localparam ZCF_SUPPORTED = 0;
 localparam ZCD_SUPPORTED = 0;
 
+// K extension instructions                                                                
+localparam ZBKB_SUPPORTED = 0;
+localparam ZBKC_SUPPORTED = 0;
+localparam ZBKX_SUPPORTED = 0;
+localparam ZKNE_SUPPORTED = 0;
+localparam ZKND_SUPPORTED = 0;
+localparam ZK_SUPPORTED = 0;
+localparam ZKNH_SUPPORTED = 0;
+
 // Memory synthesis configuration
 localparam USE_SRAM = 0;
 
diff --git a/config/rv64gc/config.vh b/config/rv64gc/config.vh
index 7f038d87e..a483ccbc4 100644
--- a/config/rv64gc/config.vh
+++ b/config/rv64gc/config.vh
@@ -181,6 +181,15 @@ localparam ZCA_SUPPORTED = 0;
 localparam ZCF_SUPPORTED = 0;
 localparam ZCD_SUPPORTED = 0;
 
+// K extension instructions                                                                
+localparam ZBKB_SUPPORTED = 0;
+localparam ZBKC_SUPPORTED = 0;
+localparam ZBKX_SUPPORTED = 0;
+localparam ZKNE_SUPPORTED = 0;
+localparam ZKND_SUPPORTED = 0;
+localparam ZK_SUPPORTED = 0;
+localparam ZKNH_SUPPORTED = 0;
+
 // Memory synthesis configuration
 localparam USE_SRAM = 0;
 
diff --git a/config/rv64i/config.vh b/config/rv64i/config.vh
index 4dd540a9f..a289003cc 100644
--- a/config/rv64i/config.vh
+++ b/config/rv64i/config.vh
@@ -181,6 +181,15 @@ localparam ZCA_SUPPORTED = 0;
 localparam ZCF_SUPPORTED = 0;
 localparam ZCD_SUPPORTED = 0;
 
+// K extension instructions                                                                
+localparam ZBKB_SUPPORTED = 0;
+localparam ZBKC_SUPPORTED = 0;
+localparam ZBKX_SUPPORTED = 0;
+localparam ZKNE_SUPPORTED = 0;
+localparam ZKND_SUPPORTED = 0;
+localparam ZK_SUPPORTED = 0;
+localparam ZKNH_SUPPORTED = 0;
+
 // Memory synthesis configuration
 localparam USE_SRAM = 0;