diff --git a/qemu/target-m68k/translate.c b/qemu/target-m68k/translate.c
index 1e938825..470bcffa 100644
--- a/qemu/target-m68k/translate.c
+++ b/qemu/target-m68k/translate.c
@@ -1665,16 +1665,20 @@ DISAS_INSN(move_from_ccr)
 DISAS_INSN(neg)
 {
     TCGContext *tcg_ctx = s->uc->tcg_ctx;
-    TCGv reg;
     TCGv src1;
+    TCGv dest;
+    TCGv addr;
+    int opsize;
 
-    reg = DREG(insn, 0);
-    src1 = tcg_temp_new(tcg_ctx);
-    tcg_gen_mov_i32(tcg_ctx, src1, reg);
-    tcg_gen_neg_i32(tcg_ctx, reg, src1);
-    gen_update_cc_add(s, reg, src1, OS_LONG);
-    tcg_gen_setcondi_i32(tcg_ctx, TCG_COND_NE, tcg_ctx->QREG_CC_X, src1, 0);
-    set_cc_op(s, CC_OP_SUBL);
+    opsize = insn_opsize(insn);
+    SRC_EA(env, src1, opsize, 1, &addr);
+    dest = tcg_temp_new(tcg_ctx);
+    tcg_gen_neg_i32(tcg_ctx, dest, src1);
+    set_cc_op(s, CC_OP_SUBB + opsize);
+    gen_update_cc_add(s, dest, src1, opsize);
+    tcg_gen_setcondi_i32(tcg_ctx, TCG_COND_NE, tcg_ctx->QREG_CC_X, dest, 0);
+    DEST_EA(env, insn, opsize, dest, &addr);
+    tcg_temp_free(tcg_ctx, dest);
 }
 
 static void gen_set_sr_im(DisasContext *s, uint16_t val, int ccr_only)