diff --git a/mozilla/dbm/tests/lots.c b/mozilla/dbm/tests/lots.c
index 2070acc95c2..db7771564c3 100644
--- a/mozilla/dbm/tests/lots.c
+++ b/mozilla/dbm/tests/lots.c
@@ -63,9 +63,6 @@ int MsgPriority=5;
 #define uint32 unsigned int
 #endif
 
-/* Hmm, everyone seems to be defining this. */
-#define STDC_HEADERS
-
 typedef enum {
 USE_LARGE_KEY,
 USE_SMALL_KEY