diff --git a/security/sandbox/chromium/sandbox/linux/system_headers/linux_seccomp.h b/security/sandbox/chromium/sandbox/linux/system_headers/linux_seccomp.h
index a60fe2..6160f9 100644
--- a/security/sandbox/chromium/sandbox/linux/system_headers/linux_seccomp.h
+++ b/security/sandbox/chromium/sandbox/linux/system_headers/linux_seccomp.h
@@ -103,8 +103,4 @@
 #define SECCOMP_RET_INVALID 0x00010000U  // Illegal return value
 #endif
 
-#ifndef SYS_SECCOMP
-#define SYS_SECCOMP                   1
-#endif
-
 #endif  // SANDBOX_LINUX_SYSTEM_HEADERS_LINUX_SECCOMP_H_