diff --git a/src/main/c/configure.ac b/src/main/c/configure.ac
index 1721999..4609e3e 100644
--- a/src/main/c/configure.ac
+++ b/src/main/c/configure.ac
@@ -1,6 +1,6 @@
 AC_PREREQ([2.61])
 AC_INIT([libusb4java], [1.0.0], [k@ailis.de])
-AM_INIT_AUTOMAKE([foreign -Wall -Werror -Wno-extra-portability])
+AM_INIT_AUTOMAKE([foreign -Wall -Werror])
 AM_SILENT_RULES(yes)
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_HEADERS([config.h])
diff --git a/src/main/c/src/usb4java.c b/src/main/c/src/usb4java.c
index 7a05959..3dca321 100644
--- a/src/main/c/src/usb4java.c
+++ b/src/main/c/src/usb4java.c
@@ -34,7 +34,7 @@ jobject NewDirectReadOnlyByteBuffer(JNIEnv *env, const void *mem,
 }
 #pragma GCC diagnostic pop
 
-jint JNI_OnLoad(JavaVM *vm, void *reserved)
+jint JNICALL JNI_OnLoad(JavaVM *vm, void *reserved)
 {
     jvm = vm;
     return JNI_VERSION_1_4;
diff --git a/src/main/resources/de/ailis/usb4java/libusb/windows-x86/libusb-1.0.dll b/src/main/resources/de/ailis/usb4java/libusb/windows-x86/libusb-1.0.dll
index be15e18..9c27aa2 100644
Binary files a/src/main/resources/de/ailis/usb4java/libusb/windows-x86/libusb-1.0.dll and b/src/main/resources/de/ailis/usb4java/libusb/windows-x86/libusb-1.0.dll differ
diff --git a/src/main/resources/de/ailis/usb4java/libusb/windows-x86/libusb4java.dll b/src/main/resources/de/ailis/usb4java/libusb/windows-x86/libusb4java.dll
index 78628cd..e6ed13a 100644
Binary files a/src/main/resources/de/ailis/usb4java/libusb/windows-x86/libusb4java.dll and b/src/main/resources/de/ailis/usb4java/libusb/windows-x86/libusb4java.dll differ