diff --git a/gen/asm-x86-32.h b/gen/asm-x86-32.h
index 3b62d383..58bbed0c 100644
--- a/gen/asm-x86-32.h
+++ b/gen/asm-x86-32.h
@@ -1945,6 +1945,7 @@ namespace AsmParserx8632
             if ( op == Op_cpuid )
             {
                 asmcode->regs[Reg_EAX] = true;
+                asmcode->regs[Reg_EBX] = true;
                 asmcode->regs[Reg_ECX] = true;
                 asmcode->regs[Reg_EDX] = true;
             }
diff --git a/gen/asm-x86-64.h b/gen/asm-x86-64.h
index edb9449d..6c521cc9 100644
--- a/gen/asm-x86-64.h
+++ b/gen/asm-x86-64.h
@@ -2067,6 +2067,7 @@ namespace AsmParserx8664
             if ( op == Op_cpuid )
             {
                 asmcode->regs[Reg_EAX] = true;
+                asmcode->regs[Reg_EBX] = true;
                 asmcode->regs[Reg_ECX] = true;
                 asmcode->regs[Reg_EDX] = true;
             }