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-rw-r--r--miasm2/arch/x86/arch.py4
-rw-r--r--test/arch/x86/arch.py6
2 files changed, 8 insertions, 2 deletions
diff --git a/miasm2/arch/x86/arch.py b/miasm2/arch/x86/arch.py
index e2c515d1..3b2117f4 100644
--- a/miasm2/arch/x86/arch.py
+++ b/miasm2/arch/x86/arch.py
@@ -3483,7 +3483,7 @@ addop("cqo", [bs8(0x99), bs_opmode64])
 addop("daa", [bs8(0x27)])
 addop("das", [bs8(0x2f)])
 addop("dec", [bs('1111111'), w8] + rmmod(d1, rm_arg_w8))
-addop("dec", [bs('01001'), reg])
+addop("dec", [bs('01001'), reg, bs_modeno64])
 addop("div", [bs('1111011'), w8] + rmmod(d6, rm_arg_w8))
 addop("enter", [bs8(0xc8), u16, u08])
 
@@ -3660,7 +3660,7 @@ addop("in", [bs("1110010"), w8, d_eax, u08])
 addop("in", [bs("1110110"), w8, d_eax, d_edx])
 
 addop("inc", [bs('1111111'), w8] + rmmod(d0, rm_arg_w8))
-addop("inc", [bs('01000'), reg])
+addop("inc", [bs('01000'), reg, bs_modeno64])
 
 addop("insb", [bs8(0x6c)])
 addop("insw", [bs8(0x6d), bs_opmode16])
diff --git a/test/arch/x86/arch.py b/test/arch/x86/arch.py
index 44f5197e..b866a325 100644
--- a/test/arch/x86/arch.py
+++ b/test/arch/x86/arch.py
@@ -848,6 +848,9 @@ reg_tests = [
     (m32, "00000000    DEC        ECX",
      "49"),
 
+    (m64, "00000000    DEC        EBX",
+     "FFCB"),
+
     (m32, "00000000    DIV        BL",
      "f6f3"),
     (m32, "00000000    DIV        EBX",
@@ -1302,6 +1305,9 @@ reg_tests = [
     (m32, "00000000    INC        ECX",
      "41"),
 
+    (m64, "00000000    INC        EBX",
+     "FFC3"),
+
     (m32, "00000000    INT        0x3",
      "CC"),
     (m32, "00000000    INT        0x21",