diff --git a/lib/corereqs.js b/lib/corereqs.js
index 5019882..a386d64 100644
--- a/lib/corereqs.js
+++ b/lib/corereqs.js
@@ -488,7 +488,7 @@ module.exports = {
        },
        function(buf)
        {
-           var res = buf.unpack('LSS');
+           var res = buf.unpack('Lss');
            ext = {};
            ext.child = res[0];
            ext.destX = res[1];
@@ -682,7 +682,7 @@ module.exports = {
 
    PolyText8: [
        function(drawable, gc, x, y, items) {
-          var format = 'CxSLLSS';
+          var format = 'CxSLLss';
           var numItems = items.length;
           var reqLen = 16;
           var args = [74, 0, drawable, gc, x, y];
@@ -801,7 +801,7 @@ module.exports = {
 		},
 		function(buff)
 		{
-			var res = buff.unpack('LSSSSSx');
+			var res = buff.unpack('LssSSSx');
 			var ext = {};
 			ext.windowid = res[0]
 			ext.xPos = res[1];
@@ -821,7 +821,7 @@ module.exports = {
 
    SetScreenSaver: [
        function(timeout, interval, preferBlanking, allowExposures) {
-           return [ 'CxSSSCCxx', [107, 3, timeout, interval, preferBlanking, allowExposures]];
+           return [ 'CxSssCCxx', [107, 3, timeout, interval, preferBlanking, allowExposures]];
        }
    ],