diff --git a/fsw/pc-rtems/src/cfe_psp_start.c b/fsw/pc-rtems/src/cfe_psp_start.c
index a1ea66cb..5d03d17f 100644
--- a/fsw/pc-rtems/src/cfe_psp_start.c
+++ b/fsw/pc-rtems/src/cfe_psp_start.c
@@ -36,6 +36,8 @@
 #include <rtems/rtems_dhcp_failsafe.h>
 #include <bsp.h>
 
+extern int rtems_fxp_attach(struct rtems_bsdnet_ifconfig *config, int attaching);
+
 /*
 ** cFE includes
 */