diff --git a/xml/gl.xml b/xml/gl.xml
index 1af1d38..7ac861e 100644
--- a/xml/gl.xml
+++ b/xml/gl.xml
@@ -19132,7 +19132,7 @@
             <param><ptype>GLuint</ptype> <name>monitor</name></param>
             <param><ptype>GLenum</ptype> <name>pname</name></param>
             <param><ptype>GLsizei</ptype> <name>dataSize</name></param>
-            <param len="dataSize"><ptype>GLuint</ptype> *<name>data</name></param>
+            <param len="COMPSIZE(dataSize)"><ptype>GLuint</ptype> *<name>data</name></param>
             <param len="1"><ptype>GLint</ptype> *<name>bytesWritten</name></param>
         </command>
         <command>