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-rw-r--r--configure.ac2
1 files changed, 2 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index 6481d74..e4793e1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -108,6 +108,8 @@ AS_IF([test "x$with_dummy" = "xyes"], [
], [
PKG_CHECK_MODULES(libusb, libusb-1.0 >= $LIBUSB_VERSION)
USB_BACKEND="libusb `$PKG_CONFIG --modversion libusb-1.0`"
+ LIBUSB_REQUIRED="libusb-1.0 >= $LIBUSB_VERSION"
+ AC_SUBST(LIBUSB_REQUIRED)
])
])
])