diff --git a/include/unicorn/x86.h b/include/unicorn/x86.h
old mode 100755
new mode 100644
diff --git a/qemu/target-i386/cpu.h b/qemu/target-i386/cpu.h
old mode 100755
new mode 100644
diff --git a/qemu/target-i386/unicorn.c b/qemu/target-i386/unicorn.c
old mode 100755
new mode 100644
diff --git a/tests/unit/test_gdt_idt_x86.c b/tests/unit/test_gdt_idt_x86.c
old mode 100755
new mode 100644
index 27183f0e..0ee0c9bc
--- a/tests/unit/test_gdt_idt_x86.c
+++ b/tests/unit/test_gdt_idt_x86.c
@@ -91,11 +91,15 @@ static void test_idt_gdt_i386(/*void **state*/)
     uc_assert_success(err);
     err = uc_reg_write(uc, UC_X86_REG_GDTR, &gdt);
     uc_assert_success(err);
+    err = uc_reg_write(uc, UC_X86_REG_LDTR, &ldt);
+    uc_assert_success(err);
+    err = uc_reg_write(uc, UC_X86_REG_TR, &tr);
+    uc_assert_success(err);
 
-    idt.base = 0;
-    idt.limit = 0;
-    gdt.base = 0;
-    gdt.limit = 0;
+    memset(&idt, 0, sizeof(idt));
+    memset(&gdt, 0, sizeof(gdt));
+    memset(&ldt, 0, sizeof(ldt));
+    memset(&tr, 0, sizeof(tr));
 
     // emulate machine code in infinite time
     err = uc_emu_start(uc, address, address+sizeof(code)-1, 0, 0);