diff --git a/isa-l.def b/isa-l.def
index e7d735c..220d48d 100644
--- a/isa-l.def
+++ b/isa-l.def
@@ -110,3 +110,4 @@ isal_read_zlib_header   	@106
 isal_write_gzip_header   	@107
 isal_write_zlib_header   	@108
 isal_zero_detect		@109
+isal_gzip_header_init		@110