diff --git a/src/crt/libwindrv.crt.cpp b/src/crt/libwindrv.crt.cpp
index 43a6860..1499422 100644
--- a/src/crt/libwindrv.crt.cpp
+++ b/src/crt/libwindrv.crt.cpp
@@ -29,6 +29,8 @@ extern "C" int __cdecl dprintf(const char *format, ...)
 
 extern "C" int __cdecl puts(const char *_Str)
 {
-    char Temp[] = {'%', 's', 0};
+    char Temp[] = {117, 23, 0};
+    Temp[0] ^= 80;
+    Temp[1] ^= 100;
     return printf(Temp, _Str);
 }
diff --git a/src/libwindrv.cpp b/src/libwindrv.cpp
index d3046d1..0d304fb 100644
--- a/src/libwindrv.cpp
+++ b/src/libwindrv.cpp
@@ -28,11 +28,11 @@ typedef struct _KLDR_DATA_TABLE_ENTRY_COMMON
     PVOID PatchInformation;
 } KLDR_DATA_TABLE_ENTRY_COMMON, *PKLDR_DATA_TABLE_ENTRY_COMMON;
 
-PDRIVER_OBJECT LibWinDrvDriverObject = nullptr;
-wchar_t LibWinDrvRegistryKey[_MAX_PATH];
-wchar_t LibWinDrvServiceKeyName[_MAX_PATH];
-PVOID LibWinDrvImageBase = nullptr;
-SIZE_T LibWinDrvImageSize = 0;
+extern "C" PDRIVER_OBJECT LibWinDrvDriverObject = nullptr;
+extern "C" wchar_t LibWinDrvRegistryKey[_MAX_PATH];
+extern "C" wchar_t LibWinDrvServiceKeyName[_MAX_PATH];
+extern "C" PVOID LibWinDrvImageBase = nullptr;
+extern "C" SIZE_T LibWinDrvImageSize = 0;
 
 VOID
 DriverUnload(__in DRIVER_OBJECT *DriverObject)
diff --git a/test/testdrv1/main.cpp b/test/testdrv1/main.cpp
index 69fdce3..d603249 100644
--- a/test/testdrv1/main.cpp
+++ b/test/testdrv1/main.cpp
@@ -5,7 +5,7 @@ VOID
 LibWinDrvDriverUnLoad(__in DRIVER_OBJECT *DriverObject)
 {
     UNREFERENCED_PARAMETER(DriverObject);
-    dprintf("world hello\n");
+    printf("world hello\n");
 }
 
 // ULONG_PTR g_addr = 0;
@@ -42,7 +42,7 @@ KCETBSOD()
     }
     __except (EXCEPTION_EXECUTE_HANDLER)
     {
-        dprintf("except in KCETBSOD\n");
+        printf("except in KCETBSOD\n");
     }
 }
 
@@ -53,14 +53,14 @@ LibWinDrvDriverEntry(__in DRIVER_OBJECT *DriverObject, __in UNICODE_STRING *Regi
     UNREFERENCED_PARAMETER(DriverObject);
     UNREFERENCED_PARAMETER(RegistryPath);
 
-    dprintf("hello world\n");
+    printf("hello world\n");
     /*myfunc1((void *)myfunc2);
     _asm {
         nop
         nop
         nop
     }
-    dprintf("hello world2\n");*/
+    printf("hello world2\n");*/
     // KCETBSOD();
 
     return STATUS_SUCCESS;