diff --git a/instanceinfo.sh b/instanceinfo.sh
index 6f1184b..d676f5d 100755
--- a/instanceinfo.sh
+++ b/instanceinfo.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 # Print some basic info about fediverse instances.
 
-# Version: 2019-06-30_1
+# Version: 2019-06-30_2
 
 if [[ -z "${1}" ]]; then
     echo "usage: ${0} DOMAIN" >&2
@@ -105,6 +105,8 @@ function main()
             implementation="Florence"
         elif grep -Eq '"version":"[0-9]+\.[0-9]+\.[0-9]+"' <<<"${json}"; then
             implementation="Mastodon"
+        elif grep -Eq '"version":"[0-9]+\.[0-9]+\.[0-9a-zA-Z]+"' <<<"${json}"; then
+            implementation="Mastodon fork"
         fi
         if [[ -n "${implementation}" ]]; then
             # shellcheck disable=SC2155
@@ -128,6 +130,7 @@ function main()
         jq -r ".stats.user_count" <<<"${json}"
 
         if [[ "${implementation}" == "Mastodon"
+                || "${implementation}" == "Mastodon fork"
                 || "${implementation}" == "Florence"
                 || "${implementation}" == "Gab" ]]; then
             echo "Further info, maybe: https://${instance}/about/more"