diff --git a/package/mongoose/mongoose-0001-largefile-conditional-define.patch b/package/mongoose/mongoose-0001-largefile-conditional-define.patch
new file mode 100644
index 0000000000..b1d759afdb
--- /dev/null
+++ b/package/mongoose/mongoose-0001-largefile-conditional-define.patch
@@ -0,0 +1,22 @@
+Avoid the following warning, due to duplicate definition of
+"_LARGEFILE_SOURCE"
+
+mongoose.c:52:0: warning: "_LARGEFILE_SOURCE" redefined [enabled by default]
+ #define _LARGEFILE_SOURCE       // Enable fseeko() and ftello() functions
+ ^
+<command-line>:0:0: note: this is the location of the previous definition
+
+Signed-off-by: Davide Viti <zinosat@tiscali.it>
+
+--- mongoose-5.4/mongoose.c~	2014-07-28 13:19:00.000000000 +0200
++++ mongoose-5.4/mongoose.c	2014-08-04 23:10:59.164092500 +0200
+@@ -49,7 +49,9 @@
+ #define _XOPEN_SOURCE 600       // For flockfile() on Linux
+ #define __STDC_FORMAT_MACROS    // <inttypes.h> wants this for C++
+ #define __STDC_LIMIT_MACROS     // C++ wants that for INT64_MAX
++#ifndef _LARGEFILE_SOURCE
+ #define _LARGEFILE_SOURCE       // Enable fseeko() and ftello() functions
++#endif
+ #define _FILE_OFFSET_BITS 64    // Enable 64-bit file offsets
+ 
+ #ifdef _MSC_VER