diff --git a/lib/isccc/api b/lib/isccc/api
index 47724c51e3..95bd204623 100644
--- a/lib/isccc/api
+++ b/lib/isccc/api
@@ -5,5 +5,5 @@
 # 9.9: 90-109
 # 9.9-sub: 130-139
 LIBINTERFACE = 90
-LIBREVISION = 3
+LIBREVISION = 4
 LIBAGE = 0