diff --git a/mozilla/xpcom/glue/standalone/nsGREDirServiceProvider.cpp b/mozilla/xpcom/glue/standalone/nsGREDirServiceProvider.cpp
index 4026a6d3211..6bf5aa96fa6 100644
--- a/mozilla/xpcom/glue/standalone/nsGREDirServiceProvider.cpp
+++ b/mozilla/xpcom/glue/standalone/nsGREDirServiceProvider.cpp
@@ -271,7 +271,7 @@ nsGREDirServiceProvider::GetXPCOMPath()
 {
   char* grePath = GetGREDirectoryPath();
   if (!grePath) {
-    grePath = PR_GetEnv(MOZILLA_FIVE_HOME);
+    grePath = PR_GetEnv("MOZILLA_FIVE_HOME");
     if (!grePath) {
       return nsnull;
     }