diff --git a/dap4_test/Makefile.am b/dap4_test/Makefile.am
index 7f3da017d1..5a69d24810 100644
--- a/dap4_test/Makefile.am
+++ b/dap4_test/Makefile.am
@@ -70,7 +70,7 @@ CLEANFILES = *.exe
 # This should only be left behind if using parallel io
 CLEANFILES += tmp_*
 
-DISTCLEANFILES = findtestserver4.c
+DISTCLEANFILES = findtestserver4.c pingurl4.c
 
 # One last thing
 BUILT_SOURCES = .daprc