diff --git a/Project/GNU/CLI/configure.ac b/Project/GNU/CLI/configure.ac
index bc360aa..180376a 100755
--- a/Project/GNU/CLI/configure.ac
+++ b/Project/GNU/CLI/configure.ac
@@ -40,6 +40,7 @@ AC_ARG_ENABLE(arch-ppc,         AC_HELP_STRING([--with-arch-ppc],           [Cre
 AC_ARG_ENABLE(arch-i386,        AC_HELP_STRING([--with-arch-i386],          [Create Mac i386 Universal binary]),          , enable_arch_i386=no)
 AC_ARG_ENABLE(arch-x86_64,      AC_HELP_STRING([--enable-arch-x86_64],      [Create Mac x86_64 architecture]),            , enable_arch_x86_64=no)
 AC_ARG_ENABLE(arch-arm64,       AC_HELP_STRING([--enable-arch-arm64],       [Create Mac arm64 architecture]),             , enable_arch_arm64=no)
+AC_ARG_ENABLE(large_files,      AC_HELP_STRING([--disable-large_files],     [Disable large files support]),               , enable_large_files=yes)
 
 dnl -------------------------------------------------------------------------
 dnl Arguments - With
@@ -62,6 +63,16 @@ dnl
 CXXFLAGS="$CXXFLAGS -pthread"
 LDFLAGS="$LDFLAGS -lpthread -pthread"
 
+dnl -------------------------------------------------------------------------
+dnl Large files
+dnl
+if test "$enable_large_files" = "yes"; then
+	CXXFLAGS="$CXXFLAGS -D_LARGE_FILES -D_FILE_OFFSET_BITS=64"
+	ZenLib_LargeFiles="yes"
+else
+	ZenLib_LargeFiles="no"
+fi
+
 dnl #########################################################################
 dnl ### C/C++ compiler options used to compile
 dnl #########################################################################
diff --git a/Project/GNU/GUI/configure.ac b/Project/GNU/GUI/configure.ac
index 422ac5c..5c7ff5b 100755
--- a/Project/GNU/GUI/configure.ac
+++ b/Project/GNU/GUI/configure.ac
@@ -46,6 +46,7 @@ AC_ARG_ENABLE(arch-ppc,         AC_HELP_STRING([--with-arch-ppc],           [Cre
 AC_ARG_ENABLE(arch-i386,        AC_HELP_STRING([--with-arch-i386],          [Create Mac i386 Universal binary]),          , enable_arch_i386=no)
 AC_ARG_ENABLE(arch-x86_64,      AC_HELP_STRING([--enable-arch-x86_64],      [Create Mac x86_64 architecture]),            , enable_arch_x86_64=no)
 AC_ARG_ENABLE(arch-arm64,       AC_HELP_STRING([--enable-arch-arm64],       [Create Mac arm64 architecture]),             , enable_arch_arm64=no)
+AC_ARG_ENABLE(large_files,      AC_HELP_STRING([--disable-large_files],     [Disable large files support]),               , enable_large_files=yes)
 
 dnl -------------------------------------------------------------------------
 dnl Arguments - With
@@ -156,6 +157,16 @@ dnl
 CXXFLAGS="$CXXFLAGS -pthread"
 LDFLAGS="$LDFLAGS -lpthread -pthread"
 
+dnl -------------------------------------------------------------------------
+dnl Large files
+dnl
+if test "$enable_large_files" = "yes"; then
+	CXXFLAGS="$CXXFLAGS -D_LARGE_FILES -D_FILE_OFFSET_BITS=64"
+	ZenLib_LargeFiles="yes"
+else
+	ZenLib_LargeFiles="no"
+fi
+
 dnl #########################################################################
 dnl ### C/C++ compiler options used to compile
 dnl #########################################################################
diff --git a/Project/QtCreator/avimetaedit-gui.pro b/Project/QtCreator/avimetaedit-gui.pro
index c8d97fa..4b1974c 100644
--- a/Project/QtCreator/avimetaedit-gui.pro
+++ b/Project/QtCreator/avimetaedit-gui.pro
@@ -36,7 +36,7 @@ TEMPLATE = app
 CONFIG += qt release
 CONFIG += no_keywords
 
-DEFINES += TIXML_USE_STL
+DEFINES += TIXML_USE_STL _LARGE_FILES _FILE_OFFSET_BITS=64
 
 HEADERS = \
     ../../Source/FromMediaInfo/FromMediaInfo.h \