diff --git a/target-m68k/translate.c b/target-m68k/translate.c
index 3f7db833f84dd3b4a07bee60c966784983a5fad1..b82ebf39ebfd3cda1fa8415f77ac235c1c635c94 100644
--- a/target-m68k/translate.c
+++ b/target-m68k/translate.c
@@ -2011,7 +2011,7 @@ DISAS_INSN(suba)
     TCGv src;
     TCGv reg;
 
-    SRC_EA(env, src, OS_LONG, 0, NULL);
+    SRC_EA(env, src, (insn & 0x100) ? OS_LONG : OS_WORD, 1, NULL);
     reg = AREG(insn, 9);
     tcg_gen_sub_i32(reg, reg, src);
 }
@@ -2203,7 +2203,7 @@ DISAS_INSN(adda)
     TCGv src;
     TCGv reg;
 
-    SRC_EA(env, src, OS_LONG, 0, NULL);
+    SRC_EA(env, src, (insn & 0x100) ? OS_LONG : OS_WORD, 1, NULL);
     reg = AREG(insn, 9);
     tcg_gen_add_i32(reg, reg, src);
 }
@@ -3351,6 +3351,7 @@ void register_m68k_insns (CPUM68KState *env)
     INSN(subx_reg,  9100, f138, M68000);
     INSN(subx_mem,  9108, f138, M68000);
     INSN(suba,      91c0, f1c0, CF_ISA_A);
+    INSN(suba,      90c0, f0c0, M68000);
 
     BASE(undef_mac, a000, f000);
     INSN(mac,       a000, f100, CF_EMAC);