diff --git a/libsndio/Makefile.in b/libsndio/Makefile.in
index 2619935..acdf71d 100644
--- a/libsndio/Makefile.in
+++ b/libsndio/Makefile.in
@@ -89,7 +89,7 @@ uninstall:
 		cd ${DESTDIR}${MAN7_DIR} && rm -f ${MAN7}
 
 clean:
-		rm -f -- ${SO} *.o *~ *.bak *.core core
+		rm -f -- *.so *.so.* *.o *~ *.bak *.core core
 
 # ---------------------------------------------------------- dependencies ---