diff --git a/mozilla/string/embed/nsEmbedString.cpp b/mozilla/string/embed/nsEmbedString.cpp
index 201ebf96d68..da35102aa20 100644
--- a/mozilla/string/embed/nsEmbedString.cpp
+++ b/mozilla/string/embed/nsEmbedString.cpp
@@ -461,7 +461,7 @@ nsEmbedCString::GrowCapacity(size_type aNewCapacity)
 // non-standalone will be using the copy in the string lib.
 // See bug 196506
 
-#ifdef STRING_EMBEDSTANDALONE
+#ifdef EMBEDSTRING_STANDALONE
 
 template <class CharT> class CalculateLength
   {
diff --git a/mozilla/xpcom/string/embed/nsEmbedString.cpp b/mozilla/xpcom/string/embed/nsEmbedString.cpp
index 201ebf96d68..da35102aa20 100644
--- a/mozilla/xpcom/string/embed/nsEmbedString.cpp
+++ b/mozilla/xpcom/string/embed/nsEmbedString.cpp
@@ -461,7 +461,7 @@ nsEmbedCString::GrowCapacity(size_type aNewCapacity)
 // non-standalone will be using the copy in the string lib.
 // See bug 196506
 
-#ifdef STRING_EMBEDSTANDALONE
+#ifdef EMBEDSTRING_STANDALONE
 
 template <class CharT> class CalculateLength
   {