diff --git a/AMBuildScript b/AMBuildScript
index b16a557d..f9e41021 100644
--- a/AMBuildScript
+++ b/AMBuildScript
@@ -291,7 +291,7 @@ class SMConfig(object):
     cxx.cflags += ['/Oy-']
 
   def configure_linux(self, cxx):
-    cxx.defines += ['_LINUX', 'POSIX']
+    cxx.defines += ['_LINUX', 'POSIX', '_FILE_OFFSET_BITS=64']
     cxx.linkflags += ['-Wl,--exclude-libs,ALL', '-lm']
     if cxx.vendor == 'gcc':
       cxx.linkflags += ['-static-libgcc']