diff --git a/lib/ruby_vm/rjit/assembler.rb b/lib/ruby_vm/rjit/assembler.rb
index 64f663ec0e..645072d11b 100644
--- a/lib/ruby_vm/rjit/assembler.rb
+++ b/lib/ruby_vm/rjit/assembler.rb
@@ -328,6 +328,17 @@ module RubyVM::RJIT
           disp: left_disp,
           imm: imm8(right_imm),
         )
+      # CMP r/m64, imm32 (Mod 01: [reg]+disp8)
+      in [QwordPtr[R64 => left_reg, IMM8 => left_disp], IMM32 => right_imm]
+        # REX.W + 81 /7 id
+        # MI: Operand 1: ModRM:r/m (r), Operand 2: imm8/16/32
+        insn(
+          prefix: REX_W,
+          opcode: 0x81,
+          mod_rm: ModRM[mod: Mod01, reg: 7, rm: left_reg],
+          disp: left_disp,
+          imm: imm32(right_imm),
+        )
       # CMP r/m64, imm8 (Mod 10: [reg]+disp32)
       in [QwordPtr[R64 => left_reg, IMM32 => left_disp], IMM8 => right_imm]
         # REX.W + 83 /7 ib
diff --git a/lib/ruby_vm/rjit/insn_compiler.rb b/lib/ruby_vm/rjit/insn_compiler.rb
index 74a982e898..cb92723d9c 100644
--- a/lib/ruby_vm/rjit/insn_compiler.rb
+++ b/lib/ruby_vm/rjit/insn_compiler.rb
@@ -2099,7 +2099,7 @@ module RubyVM::RJIT
         end
 
         # Check if the key is the same value
-        asm.cmp(key_opnd, comptime_key)
+        asm.cmp(key_opnd, to_value(comptime_key))
         side_exit = side_exit(jit, starting_context)
         jit_chain_guard(:jne, jit, starting_context, asm, side_exit)
 
diff --git a/test/ruby/rjit/test_assembler.rb b/test/ruby/rjit/test_assembler.rb
index a9ed6ce39e..fbf780d6c3 100644
--- a/test/ruby/rjit/test_assembler.rb
+++ b/test/ruby/rjit/test_assembler.rb
@@ -122,6 +122,7 @@ module RubyVM::RJIT
       asm.cmp(BytePtr[:rax, 8], 8)      # CMP r/m8, imm8 (Mod 01: [reg]+disp8)
       asm.cmp(DwordPtr[:rax, 8], 0x100) # CMP r/m32, imm32 (Mod 01: [reg]+disp8)
       asm.cmp([:rax, 8], 8)             # CMP r/m64, imm8 (Mod 01: [reg]+disp8)
+      asm.cmp([:rbx, 8], 0x100)         # CMP r/m64, imm32 (Mod 01: [reg]+disp8)
       asm.cmp([:rax, 0x100], 8)         # CMP r/m64, imm8 (Mod 10: [reg]+disp32)
       asm.cmp(:rax, 8)                  # CMP r/m64, imm8 (Mod 11: reg)
       asm.cmp(:rax, 0x100)              # CMP r/m64, imm32 (Mod 11: reg)
@@ -132,12 +133,13 @@ module RubyVM::RJIT
         0x0: cmp byte ptr [rax + 8], 8
         0x4: cmp dword ptr [rax + 8], 0x100
         0xb: cmp qword ptr [rax + 8], 8
-        0x10: cmp qword ptr [rax + 0x100], 8
-        0x18: cmp rax, 8
-        0x1c: cmp rax, 0x100
-        0x23: cmp qword ptr [rax + 8], rbx
-        0x27: cmp qword ptr [rax - 0x100], rbx
-        0x2e: cmp rax, rbx
+        0x10: cmp qword ptr [rbx + 8], 0x100
+        0x18: cmp qword ptr [rax + 0x100], 8
+        0x20: cmp rax, 8
+        0x24: cmp rax, 0x100
+        0x2b: cmp qword ptr [rax + 8], rbx
+        0x2f: cmp qword ptr [rax - 0x100], rbx
+        0x36: cmp rax, rbx
       EOS
     end