diff --git a/gfx/thebes/gfxPlatformGtk.cpp b/gfx/thebes/gfxPlatformGtk.cpp
index c8661a433111..f4e4782cfe45 100644
--- a/gfx/thebes/gfxPlatformGtk.cpp
+++ b/gfx/thebes/gfxPlatformGtk.cpp
@@ -409,7 +409,7 @@ gfxPlatformGtk::GetDPIScale()
     // scale on WINNT and at this ratio the advantages of larger rendering
     // outweigh the disadvantages from scaling and pixel mis-alignment.
     int32_t dpi = GetDPI();
-    if (dpi < 144) {
+    if (dpi < 132) {
         return 1.0;
     } else if (dpi < 168) {
         return 1.5;