diff --git a/update_engine.gyp b/update_engine.gyp
index 86981d0..8ac39ec 100644
--- a/update_engine.gyp
+++ b/update_engine.gyp
@@ -27,7 +27,6 @@
       '-Wl,--gc-sections',
     ],
     'defines': [
-      '__STDC_FORMAT_MACROS=1',
       '_POSIX_C_SOURCE=199309L',
       'USE_HWID_OVERRIDE=<(USE_hwid_override)',
       'USE_MTD=<(USE_mtd)',