diff --git a/src/ieu/controller.sv b/src/ieu/controller.sv
index c4afa86c..4d8ba0c6 100644
--- a/src/ieu/controller.sv
+++ b/src/ieu/controller.sv
@@ -161,7 +161,10 @@ module controller(
                   else if (Funct7D == 7'b0000001 & `M_SUPPORTED & `XLEN == 64)
                       ControlsD = `CTRLW'b1_000_00_00_011_0_0_0_0_1_0_0_0_1_00_0; // W-type Multiply/Divide
                   else
-                      ControlsD = `CTRLW'b0_000_00_00_000_0_0_0_0_0_0_0_0_0_00_1; // Non-implemented instruction
+                      if (Funct7D == 7'b0000100 & `ZBA_SUPPORTED)
+                        ControlsD = `CTRLW'b1_000_00_00_000_0_1_0_0_0_0_0_0_0_00_0; // adduw
+                      else
+                        ControlsD = `CTRLW'b0_000_00_00_000_0_0_0_0_0_0_0_0_0_00_1; // Non-implemented instruction
       7'b1100011:     ControlsD = `CTRLW'b0_010_11_00_000_1_0_0_0_0_0_0_0_0_00_0; // branches
       7'b1100111:     ControlsD = `CTRLW'b1_000_01_00_000_0_0_1_1_0_0_0_0_0_00_0; // jalr
       7'b1101111:     ControlsD = `CTRLW'b1_011_11_00_000_0_0_1_1_0_0_0_0_0_00_0; // jal