diff --git a/configure.ac b/configure.ac
index 71d1468..49ea29c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -47,6 +47,7 @@ AM_CONDITIONAL([OS_WIN32], [test "$os_win32" = "yes"])
 PKG_CHECK_MODULES([LIBUSB], [libusb-1.0], [have_libusb=yes], [have_libusb=no])
 if test "$have_libusb" = "yes"; then
 	AC_DEFINE([HAVE_LIBUSB], [1], [libusb support])
+	AC_SUBST([DEPENDENCIES], [libusb-1.0])
 fi
 
 # Checks for IrDA support.
diff --git a/libdivecomputer.pc.in b/libdivecomputer.pc.in
index ce37b68..b5f1274 100644
--- a/libdivecomputer.pc.in
+++ b/libdivecomputer.pc.in
@@ -6,5 +6,6 @@ includedir=@includedir@
 Name: libdivecomputer
 Description: A library for communication with various dive computers.
 Version: @VERSION@
+Requires.private: @DEPENDENCIES@
 Libs: -L${libdir} -ldivecomputer
 Cflags: -I${includedir}/libdivecomputer