diff --git a/riscv/insns/c_add.h b/riscv/insns/c_add.h
index 796e634a..0c97e3e8 100644
--- a/riscv/insns/c_add.h
+++ b/riscv/insns/c_add.h
@@ -1,3 +1,2 @@
 require_extension(EXT_ZCA);
-require(insn.rvc_rs2() != 0);
 WRITE_RD(sext_xlen(RVC_RS1 + RVC_RS2));
diff --git a/riscv/insns/c_jalr.h b/riscv/insns/c_jalr.h
index 9e5866ef..df912543 100644
--- a/riscv/insns/c_jalr.h
+++ b/riscv/insns/c_jalr.h
@@ -1,5 +1,4 @@
 require_extension(EXT_ZCA);
-require(insn.rvc_rs1() != 0);
 reg_t tmp = npc;
 set_pc(RVC_RS1 & ~reg_t(1));
 WRITE_REG(X_RA, tmp);
diff --git a/riscv/insns/c_mv.h b/riscv/insns/c_mv.h
index b227005e..8edefc51 100644
--- a/riscv/insns/c_mv.h
+++ b/riscv/insns/c_mv.h
@@ -1,3 +1,2 @@
 require_extension(EXT_ZCA);
-require(insn.rvc_rs2() != 0);
 WRITE_RD(RVC_RS2);