diff --git a/source4/heimdal/lib/asn1/version-script.map b/source4/heimdal/lib/asn1/version-script.map
new file mode 100644
index 00000000000..67f9ff0983a
--- /dev/null
+++ b/source4/heimdal/lib/asn1/version-script.map
@@ -0,0 +1,6 @@
+# Export everything, but put a tag on is so that we make ourself incompatible with older versions
+
+HEIMDAL_ASN1_1.0 {
+	global:
+		*;
+};
diff --git a/source4/heimdal_build/wscript_build b/source4/heimdal_build/wscript_build
index 700dac509bd..5f311c0cd78 100644
--- a/source4/heimdal_build/wscript_build
+++ b/source4/heimdal_build/wscript_build
@@ -691,6 +691,7 @@ if not bld.CONFIG_SET("USING_SYSTEM_ASN1"):
         )
 
     HEIMDAL_LIBRARY('asn1',
+            version_script='lib/asn1/version-script.map',
             deps="HEIMDAL_HEIM_ASN1",
             source='',
             vnum='8.0.0')