diff --git a/test_fms/topography/Makefile.am b/test_fms/topography/Makefile.am
index c5edb54576..8f873da1a9 100644
--- a/test_fms/topography/Makefile.am
+++ b/test_fms/topography/Makefile.am
@@ -52,4 +52,4 @@ SH_LOG_DRIVER = env AM_TAP_AWK='$(AWK)' $(SHELL) \
                   $(abs_top_srcdir)/test_fms/tap-driver.sh
 
 # Clean up
-CLEANFILES = input.nml *.out* *.dpi *.spi *.dyn *.spl
+CLEANFILES = input.nml *.out* *.dpi *.spi *.dyn *.spl *.nc