diff --git a/phpBB/adm/style/install_footer.html b/phpBB/adm/style/install_footer.html
index 342d8d4151..a3b2294025 100644
--- a/phpBB/adm/style/install_footer.html
+++ b/phpBB/adm/style/install_footer.html
@@ -13,7 +13,7 @@
 </div>
 
 <script type="text/javascript" src="{T_JQUERY_LINK}"></script>
-<!-- IF S_JQUERY_FALLBACK --><script type="text/javascript">window.jQuery || document.write('<script src="{T_ASSETS_PATH}/javascript/jquery.js"><\/script>')</script><!-- ENDIF -->
+<!-- IF S_JQUERY_FALLBACK --><script type="text/javascript">window.jQuery || document.write(unescape('%3Cscript src="{T_ASSETS_PATH}/javascript/jquery.js" type="text/javascript"%3E%3C/script%3E'));</script><!-- ENDIF -->
 
 </body>
 </html>
diff --git a/phpBB/adm/style/overall_footer.html b/phpBB/adm/style/overall_footer.html
index a190b2299a..f05e9c56c5 100644
--- a/phpBB/adm/style/overall_footer.html
+++ b/phpBB/adm/style/overall_footer.html
@@ -21,7 +21,7 @@
 </div>
 
 <script type="text/javascript" src="{T_JQUERY_LINK}"></script>
-<!-- IF S_JQUERY_FALLBACK --><script type="text/javascript">window.jQuery || document.write('<script src="{T_ASSETS_PATH}/javascript/jquery.js"><\/script>')</script><!-- ENDIF -->
+<!-- IF S_JQUERY_FALLBACK --><script type="text/javascript">window.jQuery || document.write(unescape('%3Cscript src="{T_ASSETS_PATH}/javascript/jquery.js" type="text/javascript"%3E%3C/script%3E'));</script><!-- ENDIF -->
 
 </body>
 </html>
diff --git a/phpBB/adm/style/simple_footer.html b/phpBB/adm/style/simple_footer.html
index 5632d3fc9c..0d697aec1d 100644
--- a/phpBB/adm/style/simple_footer.html
+++ b/phpBB/adm/style/simple_footer.html
@@ -17,7 +17,7 @@
 </div>
 
 <script type="text/javascript" src="{T_JQUERY_LINK}"></script>
-<!-- IF S_JQUERY_FALLBACK --><script type="text/javascript">window.jQuery || document.write('<script src="{T_ASSETS_PATH}/javascript/jquery.js"><\/script>')</script><!-- ENDIF -->
+<!-- IF S_JQUERY_FALLBACK --><script type="text/javascript">window.jQuery || document.write(unescape('%3Cscript src="{T_ASSETS_PATH}/javascript/jquery.js" type="text/javascript"%3E%3C/script%3E'));</script><!-- ENDIF -->
 
 </body>
 </html>
diff --git a/phpBB/styles/prosilver/template/overall_footer.html b/phpBB/styles/prosilver/template/overall_footer.html
index 67f1b922a4..4456d6b37d 100644
--- a/phpBB/styles/prosilver/template/overall_footer.html
+++ b/phpBB/styles/prosilver/template/overall_footer.html
@@ -34,7 +34,7 @@
 </div>
 
 <script type="text/javascript" src="{T_JQUERY_LINK}"></script>
-<!-- IF S_JQUERY_FALLBACK --><script type="text/javascript">window.jQuery || document.write('<script src="{T_ASSETS_PATH}/javascript/jquery.js"><\/script>')</script><!-- ENDIF -->
+<!-- IF S_JQUERY_FALLBACK --><script type="text/javascript">window.jQuery || document.write(unescape('%3Cscript src="{T_ASSETS_PATH}/javascript/jquery.js" type="text/javascript"%3E%3C/script%3E'));</script><!-- ENDIF -->
 
 </body>
 </html>
diff --git a/phpBB/styles/prosilver/template/simple_footer.html b/phpBB/styles/prosilver/template/simple_footer.html
index 75b7480aa7..3458d02495 100644
--- a/phpBB/styles/prosilver/template/simple_footer.html
+++ b/phpBB/styles/prosilver/template/simple_footer.html
@@ -7,7 +7,7 @@
 </div>
 
 <script type="text/javascript" src="{T_JQUERY_LINK}"></script>
-<!-- IF S_JQUERY_FALLBACK --><script type="text/javascript">window.jQuery || document.write('<script src="{T_ASSETS_PATH}/javascript/jquery.js"><\/script>')</script><!-- ENDIF -->
+<!-- IF S_JQUERY_FALLBACK --><script type="text/javascript">window.jQuery || document.write(unescape('%3Cscript src="{T_ASSETS_PATH}/javascript/jquery.js" type="text/javascript"%3E%3C/script%3E'));</script><!-- ENDIF -->
 
 </body>
 </html>