1 files changed, 13 insertions, 0 deletions
diff --git a/metapost/context/base/mp-tool.mpiv b/metapost/context/base/mp-tool.mpiv
index 10549468f..b47f5e8bf 100644
--- a/metapost/context/base/mp-tool.mpiv
+++ b/metapost/context/base/mp-tool.mpiv
@@ -64,6 +64,19 @@ vardef ddecimal primary p =
     decimal xpart p & " " & decimal ypart p
 enddef ;
 
+%D Plain compatibility:
+
+string plain_compatibity_data ; plain_compatibity_data := "" ;
+
+def startplaincompatibity =
+    begingroup ;
+    scantokens plain_compatibity_data ;
+enddef ;
+
+def stopplaincompatibity =
+    endgroup ;
+enddef ;
+
 %D Colors:
 
 newinternal nocolormodel   ; nocolormodel   := 1 ;