diff --git a/2013/endoh3/Makefile b/2013/endoh3/Makefile
index 41622f97f..31aa8d3b6 100644
--- a/2013/endoh3/Makefile
+++ b/2013/endoh3/Makefile
@@ -204,7 +204,7 @@ clean:
 
 clobber: clean
 	${RM} -f ${TARGET} ${ALT_TARGET}
-	${RM} -rf *.dSYM
+	${RM} -rf *.dSYM *.wav
 	@-if [ -e sandwich ]; then \
 	    ${RM} -f sandwich; \
 	    echo 'ate sandwich'; \