diff --git a/insns/insn_jalr.py b/insns/insn_jalr.py
index 9ea4736..56dddd0 100644
--- a/insns/insn_jalr.py
+++ b/insns/insn_jalr.py
@@ -8,6 +8,7 @@ class rvfi_insn_jalr(rvfi_insn_I):
     def elaborate(self, platform):
         m = super(rvfi_insn_jalr, self).elaborate(platform)
 
+        # JALR instruction
         next_pc = Signal(32)
         m.d.comb += next_pc.eq((self.rvfi_rs1_rdata + self.insn_imm) & ~1)
         m.d.comb += self.spec_valid.eq(self.rvfi_valid & (~self.insn_padding) & (self.insn_funct3 == 0b000) & (self.insn_opcode == 0b1100111))