diff --git a/mod/scorm/lib.php b/mod/scorm/lib.php
index 280be94c474..13d4459c299 100755
--- a/mod/scorm/lib.php
+++ b/mod/scorm/lib.php
@@ -494,7 +494,7 @@ function scorm_grade_item_update($scorm, $grades=NULL) {
     $params = array('itemname'=>$scorm->name, 'idnumber'=>$scorm->cmidnumber);
 
     if (($scorm->grademethod % 10) == 0) { // GRADESCOES
-        if ($maxgrade = count_records_select('scorm_scoes',"scorm='$scorm->id' AND launch<>''")) {
+        if ($maxgrade = count_records_select('scorm_scoes',"scorm='$scorm->id' AND launch<>'".sql_empty()."'")) {
             $params['gradetype'] = GRADE_TYPE_VALUE;
             $params['grademax']  = $maxgrade;
             $params['grademin']  = 0;
diff --git a/mod/scorm/loadSCO.php b/mod/scorm/loadSCO.php
index e39ed2541c0..377d2a7e8cc 100755
--- a/mod/scorm/loadSCO.php
+++ b/mod/scorm/loadSCO.php
@@ -40,7 +40,7 @@
         if ($sco = scorm_get_sco($scoid)) {
             if ($sco->launch == '') {
                 // Search for the next launchable sco
-                if ($scoes = get_records_select('scorm_scoes','scorm='.$scorm->id." AND launch<>'' AND id>".$sco->id,'id ASC')) {
+                if ($scoes = get_records_select('scorm_scoes','scorm='.$scorm->id." AND launch<>'".sql_empty()."' AND id>".$sco->id,'id ASC')) {
                     $sco = current($scoes);
                 }
             }
@@ -50,7 +50,7 @@
     // If no sco was found get the first of SCORM package
     //
     if (!isset($sco)) {
-        $scoes = get_records_select('scorm_scoes','scorm='.$scorm->id." AND launch<>''",'id ASC');
+        $scoes = get_records_select('scorm_scoes','scorm='.$scorm->id." AND launch<>'".sql_empty()."'",'id ASC');
         $sco = current($scoes);
     }
 
diff --git a/mod/scorm/locallib.php b/mod/scorm/locallib.php
index f70b8dea235..1a6391333bb 100755
--- a/mod/scorm/locallib.php
+++ b/mod/scorm/locallib.php
@@ -358,7 +358,7 @@ function scorm_grade_user_attempt($scorm, $userid, $attempt=1, $time=false) {
     $grademethod = $scorm->grademethod % 10;
 
     foreach ($scoes as $sco) { 
-        if ($userdata=scorm_get_tracks($sco->id, $userid,$attempt)) {
+        if ($userdata = scorm_get_tracks($sco->id, $userid, $attempt)) {
             if (($userdata->status == 'completed') || ($userdata->status == 'passed')) {
                 $attemptscore->scoes++;
             }       
@@ -474,7 +474,7 @@ function scorm_count_launchable($scormid,$organization='') {
     if (!empty($organization)) {
         $strorganization = " AND organization='$organization'";
     }
-    return count_records_select('scorm_scoes',"scorm=$scormid$strorganization AND launch<>''");
+    return count_records_select('scorm_scoes',"scorm=$scormid$strorganization AND launch<>'".sql_empty()."'");
 }
 
 function scorm_get_last_attempt($scormid, $userid) {
@@ -630,7 +630,7 @@ function scorm_view_display ($user, $scorm, $action, $cm, $boxwidth='') {
 function scorm_simple_play($scorm,$user) {
    $result = false;
   
-   $scoes = get_records_select('scorm_scoes','scorm='.$scorm->id.' AND launch<>\'\'');
+   $scoes = get_records_select('scorm_scoes','scorm='.$scorm->id.' AND launch<>\''.sql_empty().'\'');
    
    if ($scoes && (count($scoes) == 1)) {
        if ($scorm->skipview >= 1) {