diff --git a/mozilla/mailnews/compose/src/nsMsgCompUtils.cpp b/mozilla/mailnews/compose/src/nsMsgCompUtils.cpp
index 6c2120756f4..0a1110c8450 100644
--- a/mozilla/mailnews/compose/src/nsMsgCompUtils.cpp
+++ b/mozilla/mailnews/compose/src/nsMsgCompUtils.cpp
@@ -456,6 +456,7 @@ mime_generate_headers (nsMsgCompFields *fields,
 		PUSH_STRING( acceptlang );
 		PUSH_NEWLINE();
 	}
+        PR_FREEIF(acceptlang);
 
 	PUSH_STRING ("MIME-Version: 1.0" CRLF);