diff --git a/docs/libcurl/curl_global_init.3 b/docs/libcurl/curl_global_init.3
index 6a0838357ba2f8306340e67ea0bdbcbe64b888d9..8e1cc180b0298834beee0b8012b073766f1acf89 100644
--- a/docs/libcurl/curl_global_init.3
+++ b/docs/libcurl/curl_global_init.3
@@ -56,7 +56,8 @@ details of how to use this function.
 .SH FLAGS
 .TP 5
 .B CURL_GLOBAL_ALL
-Initialize everything possible. This sets all known bits.
+Initialize everything possible. This sets all known bits except
+\fBCURL_GLOBAL_ACK_EINTR\fP.
 .TP
 .B CURL_GLOBAL_SSL
 Initialize SSL