diff --git a/src/libsodium/randombytes/randombytes_sysrandom.c b/src/libsodium/randombytes/randombytes_sysrandom.c
index 7f5e60a9..c24792d6 100644
--- a/src/libsodium/randombytes/randombytes_sysrandom.c
+++ b/src/libsodium/randombytes/randombytes_sysrandom.c
@@ -21,8 +21,6 @@
 # include <Wincrypt.h>
 #endif
 
-#define COMPILER_ASSERT(X) (void) sizeof(char[(X) ? 1 : -1])
-
 typedef struct SysRandom_ {
 #ifdef _WIN32
     HCRYPTPROV    hcrypt_prov;