diff --git a/target-arm/translate.c b/target-arm/translate.c
index e5f5cfb..26e6bf4 100644
--- a/target-arm/translate.c
+++ b/target-arm/translate.c
@@ -4905,7 +4905,7 @@ static int disas_neon_data_insn(CPUState * env, DisasContext *s, uint32_t insn)
                 imm = (imm << 8) | (imm << 24);
                 break;
             case 12:
-                imm = (imm < 8) | 0xff;
+                imm = (imm << 8) | 0xff;
                 break;
             case 13:
                 imm = (imm << 16) | 0xffff;