diff --git a/documentation/installation_guide.html b/documentation/installation_guide.html
index a2f2840bd3..fea6204a54 100644
--- a/documentation/installation_guide.html
+++ b/documentation/installation_guide.html
@@ -16,7 +16,7 @@
   
   <style type="text/css">
 	<!--
-		@page { size: 21cm 29.7cm; margin: 2cm }
+		page { width: 21cm; height: 29.7cm; margin: 2cm }
 		pre { font-family: "Courier New", monospace }
 		p { margin-bottom: 0.21cm }
 		.code {margin: 1em 1em 1em 2em; padding: 0.5em; background-color: rgb(229, 229, 229); vertical-align: top; border: 1px solid #999999;}
diff --git a/documentation/installation_guide_es_ES.html b/documentation/installation_guide_es_ES.html
index bf5ff27fdc..4404cc797f 100755
--- a/documentation/installation_guide_es_ES.html
+++ b/documentation/installation_guide_es_ES.html
@@ -16,7 +16,7 @@
   
   <style type="text/css">
 	<!--
-		@page { size: 21cm 29.7cm; margin: 2cm }
+		page { width: 21cm; height: 29.7cm; margin: 2cm }
 		pre { font-family: "Courier New", monospace }
 		p { margin-bottom: 0.21cm }
 		.code {margin: 1em 1em 1em 2em; padding: 0.5em; background-color: rgb(229, 229, 229); vertical-align: top; border: 1px solid #999999;}