diff --git a/xml/gl.xml b/xml/gl.xml
index 7cc4914..c2158a9 100644
--- a/xml/gl.xml
+++ b/xml/gl.xml
@@ -20797,13 +20797,13 @@
             <proto>void <name>glGetnPixelMapfv</name></proto>
             <param group="PixelMap"><ptype>GLenum</ptype> <name>map</name></param>
             <param><ptype>GLsizei</ptype> <name>bufSize</name></param>
-            <param><ptype>GLfloat</ptype> *<name>values</name></param>
+            <param len="COMPSIZE(bufSize)"><ptype>GLfloat</ptype> *<name>values</name></param>
         </command>
         <command>
             <proto>void <name>glGetnPixelMapfvARB</name></proto>
             <param group="PixelMap"><ptype>GLenum</ptype> <name>map</name></param>
             <param><ptype>GLsizei</ptype> <name>bufSize</name></param>
-            <param len="bufSize"><ptype>GLfloat</ptype> *<name>values</name></param>
+            <param len="COMPSIZE(bufSize)"><ptype>GLfloat</ptype> *<name>values</name></param>
         </command>
         <command>
             <proto>void <name>glGetnPixelMapuiv</name></proto>