diff --git a/third_party/srtp/crypto/ae_xfm/xfm.c b/third_party/srtp/crypto/ae_xfm/xfm.c
index f149d46..0655aca 100644
--- a/third_party/srtp/crypto/ae_xfm/xfm.c
+++ b/third_party/srtp/crypto/ae_xfm/xfm.c
@@ -176,6 +176,9 @@
 
 
 #define ENC 1
+
+// eVC4 declares DEBUG
+#undef DEBUG
 
 #define DEBUG 0