diff --git a/config/rv32gc/wally-config.vh b/config/rv32gc/wally-config.vh
index 57857f3b..1fb89abf 100644
--- a/config/rv32gc/wally-config.vh
+++ b/config/rv32gc/wally-config.vh
@@ -144,10 +144,10 @@
 `define DIVCOPIES 32'h4
 
 // bit manipulation
-`define ZBA_SUPPORTED 0
-`define ZBB_SUPPORTED 0
-`define ZBC_SUPPORTED 0
-`define ZBS_SUPPORTED 0
+`define ZBA_SUPPORTED 1
+`define ZBB_SUPPORTED 1
+`define ZBC_SUPPORTED 1
+`define ZBS_SUPPORTED 1
 
 // Memory synthesis configuration
 `define USE_SRAM 0