diff --git a/mozilla/xpcom/ds/nsTextFormater.cpp b/mozilla/xpcom/ds/nsTextFormater.cpp
index 031d2cc380a..381b7aab869 100644
--- a/mozilla/xpcom/ds/nsTextFormater.cpp
+++ b/mozilla/xpcom/ds/nsTextFormater.cpp
@@ -352,6 +352,7 @@ static int cvt_f(SprintfState *ss, double d, const PRUnichar *fmt0, const PRUnic
         }
     }
 #endif
+    sprintf(fout, fin, d);
     /*
     ** This assert will catch overflow's of fout, when building with
     ** debugging on. At least this way we can track down the evil piece
diff --git a/mozilla/xpcom/ds/nsTextFormatter.cpp b/mozilla/xpcom/ds/nsTextFormatter.cpp
index 819c85ddddf..9f7c6662b00 100644
--- a/mozilla/xpcom/ds/nsTextFormatter.cpp
+++ b/mozilla/xpcom/ds/nsTextFormatter.cpp
@@ -352,6 +352,8 @@ static int cvt_f(SprintfState *ss, double d, const PRUnichar *fmt0, const PRUnic
         }
     }
 #endif
+    sprintf(fout, fin, d);
+
     /*
     ** This assert will catch overflow's of fout, when building with
     ** debugging on. At least this way we can track down the evil piece