diff --git a/mozilla/gfx/src/gtk/nsDeviceContextGTK.cpp b/mozilla/gfx/src/gtk/nsDeviceContextGTK.cpp
index 7784ca6cd16..a3e3942db0a 100644
--- a/mozilla/gfx/src/gtk/nsDeviceContextGTK.cpp
+++ b/mozilla/gfx/src/gtk/nsDeviceContextGTK.cpp
@@ -77,7 +77,7 @@ NS_IMETHODIMP nsDeviceContextGTK::Init(nsNativeWidget aNativeWidget)
 
   mWidget = aNativeWidget;
 
-  static nscoord dpi = 96;
+  static nscoord dpi = 100;
   static int initialized = 0;
   if (!initialized) {
     initialized = 1;