diff --git a/adb/transport_usb.c b/adb/transport_usb.c
index ee6b637..3d19803 100644
--- a/adb/transport_usb.c
+++ b/adb/transport_usb.c
@@ -23,10 +23,6 @@
 #define  TRACE_TAG  TRACE_TRANSPORT
 #include "adb.h"
 
-#if ADB_HOST
-#include "usb_vendors.h"
-#endif
-
 #ifdef HAVE_BIG_ENDIAN
 #define H4(x)	(((x) & 0xFF000000) >> 24) | (((x) & 0x00FF0000) >> 8) | (((x) & 0x0000FF00) << 8) | (((x) & 0x000000FF) << 24)
 static inline void fix_endians(apacket *p)
@@ -131,18 +127,6 @@
 #if ADB_HOST
 int is_adb_interface(int vid, int pid, int usb_class, int usb_subclass, int usb_protocol)
 {
-    unsigned i;
-    for (i = 0; i < vendorIdCount; i++) {
-        if (vid == vendorIds[i]) {
-            if (usb_class == ADB_CLASS && usb_subclass == ADB_SUBCLASS &&
-                    usb_protocol == ADB_PROTOCOL) {
-                return 1;
-            }
-
-            return 0;
-        }
-    }
-
-    return 0;
+    return (usb_class == ADB_CLASS && usb_subclass == ADB_SUBCLASS && usb_protocol == ADB_PROTOCOL);
 }
 #endif
diff --git a/adb/usb_vendors.c b/adb/usb_vendors.c
index 3b08907..1b73521 100755
--- a/adb/usb_vendors.c
+++ b/adb/usb_vendors.c
@@ -298,7 +298,7 @@
 int vendorIds[VENDOR_COUNT_MAX];
 unsigned vendorIdCount = 0;
 
-int get_adb_usb_ini(char* buff, size_t len);
+static int get_adb_usb_ini(char* buff, size_t len);
 
 void usb_vendors_init(void)
 {
@@ -348,7 +348,7 @@
 /* Utils methods */
 
 /* builds the path to the adb vendor id file. returns 0 if success */
-int build_path(char* buff, size_t len, const char* format, const char* home)
+static int build_path(char* buff, size_t len, const char* format, const char* home)
 {
     if (snprintf(buff, len, format, home, ANDROID_PATH, ANDROID_ADB_INI) >= (signed)len) {
         return 1;
@@ -358,7 +358,7 @@
 }
 
 /* fills buff with the path to the adb vendor id file. returns 0 if success */
-int get_adb_usb_ini(char* buff, size_t len)
+static int get_adb_usb_ini(char* buff, size_t len)
 {
 #ifdef _WIN32
     const char* home = getenv("ANDROID_SDK_HOME");