diff --git a/host/lib/Makefile.am b/host/lib/Makefile.am
index 8a2efa5..17d4b80 100644
--- a/host/lib/Makefile.am
+++ b/host/lib/Makefile.am
@@ -20,7 +20,7 @@
 
 include $(top_srcdir)/Makefile.common
 
-common_INCLUDES = $(USRP_INCLUDES)
+common_INCLUDES = $(USRP_INCLUDES) -I$(USB_INCLUDEDIR)
 
 lib_LTLIBRARIES = libusrp.la
 
diff --git a/host/swig/Makefile.am b/host/swig/Makefile.am
index 6af452b..084cc1b 100644
--- a/host/swig/Makefile.am
+++ b/host/swig/Makefile.am
@@ -25,6 +25,7 @@ AM_CPPFLAGS =			\
 	$(USRP_INCLUDES)	\
 	$(PYTHON_CPPFLAGS)	\
 	-I$(srcdir)		\
+	-I$(USB_INCLUDEDIR)	\
 	$(WITH_INCLUDES)
 
 #################################