diff --git a/internal/test_util/libcode/vx_nc_util/Makefile.am b/internal/test_util/libcode/vx_nc_util/Makefile.am
index b374eba00f..2ae67d233c 100644
--- a/internal/test_util/libcode/vx_nc_util/Makefile.am
+++ b/internal/test_util/libcode/vx_nc_util/Makefile.am
@@ -42,6 +42,7 @@ test_pressure_levels_LDADD = -lvx_stat_out \
 	-lvx_config \
 	-lvx_gsl_prob \
 	-lvx_cal \
+        -lvx_nav \
 	-lvx_util_math \
 	-lvx_util \
 	-lvx_math \