diff --git a/gfx/src/gtk/nsFontMetricsXft.cpp b/gfx/src/gtk/nsFontMetricsXft.cpp
index a8599faaada..c9348d1a652 100644
--- a/gfx/src/gtk/nsFontMetricsXft.cpp
+++ b/gfx/src/gtk/nsFontMetricsXft.cpp
@@ -1141,7 +1141,7 @@ nsFontMetricsXft::SetupFCPattern(void)
 
     // If there's a generic add a pref for the generic if there's one
     // set.
-    if (mGenericFont) {
+    if (mGenericFont && (mFontList.Count()==1)) {
         nsCString name;
         name += "font.name.";
         name += mGenericFont->get();
@@ -1176,7 +1176,7 @@ nsFontMetricsXft::SetupFCPattern(void)
     }
 
     // Add the generic if there is one.
-    if (mGenericFont)
+    if (mGenericFont && (mFontList.Count()==1))
         AddFFRE(mPattern, mGenericFont, PR_FALSE);
 
     if (PR_LOG_TEST(gXftFontLoad, PR_LOG_DEBUG)) {