diff --git a/libuuu/bmap.cpp b/libuuu/bmap.cpp
index adf6446b..c2cbfdf4 100644
--- a/libuuu/bmap.cpp
+++ b/libuuu/bmap.cpp
@@ -6,8 +6,6 @@
 #include "libcomm.h"
 #include "libuuu.h"
 
-extern int g_verbose;
-
 bmap_mode g_bmap_mode = bmap_mode::Default;
 
 bmap_mode uuu_get_bmap_mode()
@@ -160,7 +158,7 @@ bool load_bmap(const std::string& filename, bmap_t& bmap)
 			return -1;
 	}
 
-	if (g_verbose) {
+	if (get_libuuu_debug_level() > LIBUUU_NORMAL) {
 		auto info = std::string("\nUsing block map:") +
 				"\n  ImageSize: " + std::to_string(bmap.image_size()) +
 				"\n  BlockSize: " + std::to_string(bmap.block_size()) +
diff --git a/libuuu/error.cpp b/libuuu/error.cpp
index 6d8b567a..3c23a3a9 100644
--- a/libuuu/error.cpp
+++ b/libuuu/error.cpp
@@ -49,6 +49,11 @@ int get_libusb_debug_level() noexcept
 	return g_debug_level & 0xFFFF;
 }
 
+int get_libuuu_debug_level() noexcept
+{
+	return g_debug_level & 0xFFFF0000;
+}
+
 void uuu_set_debug_level(uint32_t mask)
 {
 	g_debug_level = mask;
diff --git a/libuuu/libcomm.h b/libuuu/libcomm.h
index c9a9bd6b..5e5dacdc 100644
--- a/libuuu/libcomm.h
+++ b/libuuu/libcomm.h
@@ -46,6 +46,7 @@ void call_notify(struct uuu_notify nf);
 #define dbg printf
 
 int get_libusb_debug_level() noexcept;
+int get_libuuu_debug_level() noexcept;
 
 class string_ex : public std::string
 {
diff --git a/libuuu/libuuu.h b/libuuu/libuuu.h
index 6f5a09f3..554f9d41 100644
--- a/libuuu/libuuu.h
+++ b/libuuu/libuuu.h
@@ -134,6 +134,12 @@ int uuu_set_wait_timeout(int timeout_in_seconds);
 int uuu_set_wait_next_timeout(int timeout_in_seconds);
 /*Set usb device polling period */
 void uuu_set_poll_period(int period_in_milliseconds);
+
+enum LIBUUU_DEBUG_LEVEL
+{
+	LIBUUU_NORMAL = 0,
+	LIBUUU_DETAIL = 0x8 << 16,
+};
 /*
  * bit 0:15 for libusb
  * bit 16:31 for uuu
diff --git a/uuu/uuu.cpp b/uuu/uuu.cpp
index da716ef6..c1ad05af 100644
--- a/uuu/uuu.cpp
+++ b/uuu/uuu.cpp
@@ -960,11 +960,12 @@ int main(int argc, char **argv)
 			else if (s == "-v")
 			{
 				g_verbose = 1;
+				uuu_set_debug_level(LIBUUU_DETAIL);
 			}
 			else if (s == "-V")
 			{
 				g_verbose = 1;
-				uuu_set_debug_level(2);
+				uuu_set_debug_level(LIBUUU_DETAIL | 2);
 			}else if (s == "-dry")
 			{
 				dryrun = 1;