diff --git a/lib/corereqs.js b/lib/corereqs.js
index 1dd0518..ea6e0d7 100644
--- a/lib/corereqs.js
+++ b/lib/corereqs.js
@@ -642,7 +642,12 @@ module.exports = {
        }
    ],
 
-   // opcode 55
+   FreePixmap: [
+       function(pixmap) {
+           return [ 'CxSL', [ 54, 2, pixmap ] ];
+       }
+   ],
+
    CreateGC: [
        function(cid, drawable, values) {
            var format = 'CxSLLL';